The Daughter & Father Killers – The Murder of Diane Tilly

An article by:
25th March 2020  •  6 min read

Diane Tilly was a well-known and well-loved teacher from San Antonio, Texas. She cared deeply for troubled students and became a mother figure to many of them. In 2004, she vanished. Shortly thereafter, a teenage girl and her father were arrested and a lurid background of abuse and incest would come to the surface.


The Daughter & Father Killers - The Murder of Diane Tilly

Morbidology Podcast

The article continues below

Morbidology is a weekly true crime podcast created and hosted by Emily G. Thompson. Using investigative research combined with primary audio, Morbidology takes an in-depth look at true crime cases from all across the world.


Diane Tilly lived her life with zest and enthusiasm. Her friends would say that she had a mischievous humor and a smile that radiated in any crowd. Diane had helped establish Robbins Academy, an alternative high school for high-risk students in San Antonio, Texas. Here, she used the skills that made her such a great friend and mother.

She inspired those all around her with her generosity and dedication to improving her student’s lives. She had a strong belief that every single student, regardless of their circumstances, could succeed. “Diane was the heart of the school to the teachers as well as the students,” said Bill Sain, a Robbins Academy math teacher. “Diane would never let students give up.”1

In fact, Diane would become so close to her students that a number would stay in contact with her after their graduation. In a way, Diane considered herself a mother to the struggling students. Diane had two birth children and she referred to them as the greatest achievement. “Momma talked about her friends, students and family as if they could do no wrong – she really felt that way,” recollected her son, Stephen Tilly.2

Diane had just returned home from a school reunion in a wonderful mood on the 22nd of November, 2004. She was expecting a second grandchild and she was going to visit a boyfriend over the thanksgiving period. Unbeknownst to her, he planned on proposing. Unfortunately, however, somebody else had different plans for Diane that evening.

Ronnie Joe Neal and his 15-year-old daughter, Pearl Cruz, had been planning on robbing and killing Diane “because she was wealthy and made a lot of money.” The plan began with a scheme to gain the teacher’s trust. Ronnie had met Diane as he was handing out flyers for his lawn-mowing business. She decided to hire him to do some work in her garden. As they got to know one another, Ronnie told Diane about his daughter, Pearl. Diane was moved by Ronnie’s stories about his daughter that one afternoon, she randomly gifted him a swing set. Ronnie took this opportunity to bring Pearl over to Diane’s home to introduce them.

On that fateful evening in November 2004, their plans materialized. At around 7:30PM, Pearl knocked on Diane’s door and told her that her car had broken down. She asked if she could come inside to use the phone to which Diane agreed. Once inside, Pearl produced a handgun that was given to her by her father. Pearl then let Ronnie in through the door and the duo ransacked the house. Not satisfied with their loot, Ronnie took Diane’s ATM card and went to a nearby gas station, leaving Pearl alone with Diane. Diane had attempted to thwart the robbery and had given Ronnie a false PIN number. When he returned, he was infuriated and threatened to kill Diane’s cat if she did not comply. Finally, Diane gave in and gave him the correct PIN number.3

When Ronnie came back to the house after emptying Diane’s account, he took Diane into the bedroom. He tied her hands behind her back and placed a pillowcase over her head and raped her as Pearl held the gun to her head. When Ronnie was finished, he ordered Diane to leave the home and climb into the car. Diane refused. Ronnie responded by firing a warning shot into the couch. Wearing nothing but a t-shirt, Diane was forced into the car.

Ronnie and Pearl drove Diane to a rural field in Schertz. Diane was forced over the barbed-wire fence and pleaded for her life. Her cries were unheard; Ronnie forced Diane to the floor and shot her with a .357-caliber gun. “It burns, it burns,” Diane hollered. Ignoring her pleas, Ronnie fired another four rounds into Diane as she lay in the muddy field. Somehow, Diane was still clinging to life. In the last few moments of Diane’s life, she prayed not for herself but for the young soul of one of her killers. “Bless this child,” declared Diane in reference to Pearl before she was shot one final time.

It was discovered that Diane was missing on the morning of the 23rd of November when she didn’t deliver turkeys for a Thanksgiving luncheon at the Robbins Academy. Pearl and Ronnie were quickly apprehended after they were spotted on CCTV using Diane’s ATM card following the murder. Investigators found items that had been stolen from Diane in Pearl and Ronnie’s motel room. Upon their arrest, they refused to confess to what had happened and claimed they had nothing to do with Diane’s disappearance.  

As the search for Diane was underway, a ceremony to honor her was held at Alamo Heights Methodist Church. During the service, they prayed for Diane to be found safe and recalled memories of her life. A number of Diane’s former students attended the ceremony and spoke fondly of Diane. “I can still remember the day my life turned for the good, when you opened your arms and welcomed me to a brighter future,” read one letter from Nicole Bagley. “So we don’t look alike, you didn’t give birth to me, we haven’t known each other for all my life; but forever I will love you.” Those in attendance had no idea that Diane would not be coming home.

The Daughter & Father Killers - The Murder of Diane Tilly

Just the following day, Diane’s body was found after Pearl confessed to the murder. She informed investigators where Diane’s body was after making a deal with prosecutors. “The details were pretty specific as to what we’d find here,” said Lt. Ron Bennett of the Bexar County Sheriff’s Department. Diane’s body had been partially hidden underneath some brush about 150 feet off the roadway in a farming area on Scenic Lake Drive. “It’s obviously not the resolution we want,” Alamo Heights school district spokesman Kevin Brown said. “But I think the unknown is so difficult, I think for the family and all of our staff and her students and her friends, I think it’s important that we have closure. We just wish that it was a different result.”

Diane was laid to rest on the 11th of December. Around 200 friends and family attended the celebration of her life which was held at the First United Methodist Church in Waxahachie, around 30 miles south of Dallas. Following the emotional service, Diane was laid to rest at Hillcrest Burial Park.4

Following the arrest of Pearl and Ronnie, many questioned what could have happened in Pearl’s life that she ended up involved in such a barbaric crime. As it would soon become public knowledge, Pearl was well-known to CPS and had run away from home on numerous occasions. She had been under investigation as an alleged child abuse victim but Bexar County Child Protection Services rejected a suggestion that she should be taken into state custody. “The child wasn’t in any immediate danger,” said agency public information director Mary Walker. “Her family was working and cooperating with the agency, and getting an appropriate relative to care for the child. We were in the process, or we were attempting to provide services for her and for that family, but the child ran away again.”5

At the time of the murder, Pearl had been living with her grandmother, Annie Pine, after her mother, Elisa Stanley, had been terminated of the parental rights of her ten children. Pearl was a habitual runaway and quite often, she ended up at the trailer of her father. It was soon discovered that Pearl was pregnant during the robbery and murder and a DNA test would show that the baby she was carrying belonged to her own father.6

Ronnie had first sexually abused Pearl when she was just 13-years-old. Soon enough, Ronnie started to sell Pearl to other men for money and drugs. He would rent out a cheap motel along Austin Highway and arrange for men to meet him and Pearl there. “He would have me have sex with two older men. It was a regular thing. Every Friday,” said Pearl. According to Pearl, other members of the family knew that Ronnie was sexually abusing her yet did nothing to protect her. In addition, Ronnie introduced her to alcohol, marijuana and cocaine.7

During the trial, Pearl testified against Ronnie. In more than five hours of testimony, Pearl walked jurors through step-by-step details of how the murder took place. She described how they had held Diane hostage for more than four hours before finally murdering her in the desolate field. Ronnie’s defense, however, suggested that Pearl had pulled the trigger. During her testimony, Pearl had said that she was “jealous and mad” when her father raped Diane.8

Ronnie was found guilty of first-degree murder and sentenced to death. Pearl pleaded guilty and was sentenced to 30 years in prison. However, she was released in 2009. Ronnie committed suicide in prison in June of 2010. He had hoarded his prescription anti-depressants and overdosed on them.

Diane Tilly’s memory still lives in and her impact on the struggling children of Robbins Academy still remains local legend. On the one year anniversary of her murder, a garden in her memory was created at the school and inside, a massive bronze plaque baring her name was unveiled. The small garden was planted at the foot of a sprawling live oak tree on the school’s front lawn and consisted of native Texas flowers and plants as well as a stone bench engraved with Diane’ name. In the middle sits a pink, granite marker which reads: “A great soul serves everyone all the time. A great soul never dies. It brings us together again and again.”9

4.8 21 votes
Article Rating

Footnotes:

  1. San Antonio Express-News, 5 December, 2004 – “Grim Discovery Ends Hunt for Teacher”
  2. San Antonio Express-News, 4 December, 2004 – “Ceremony Honors Missing Teacher”
  3. San Antonio Express-News, 6 December, 2004 – “Terrifying Encounter”
  4. San Antonio Express-News, 12 December, 2004 – “Tilly is Recalled as one who Shared ‘The Light of Life’”
  5. San Antonio Express-News, 3 December, 2004 – “Teen Tied to Teacher’s Case Possibly Abused”
  6. San Antonio Express-News, 23 February, 2006 – “Heights Teacher Died With a Blessing on Her Lips”
  7. San Antonio Express-News, 4 April, 2006 – “Murderer’s Daughter Tells of Sex and Drugs”
  8. San Antonio Express-News, 28 February, 2006 – “Defense Suggests Teen Was Teacher’s Killer”
  9. San Antonio Express-News, 23 November, 2005 – “Teacher’s Memory Lives On”

Comments:

Subscribe
Notify me of
guest

39 Comments
oldest
newest most voted
Inline Feedbacks
View all comments
Lorna Murdoch-Eaton
Lorna Murdoch-Eaton
4 years ago

How can releasing Pearl Cruz after such a short time in prison be “justice”. That’s appalling and shameful.

Freedom
Freedom
4 years ago

She was a child who was abused and traumatized she didn’t deserve 30 years.

Sarah
Sarah
4 years ago
Reply to  Freedom

I think no one talks about this but a child going through what she went through absolutely ends up with PTSD. Just like children in inner cities who deal with drive bys and gang violence.

However, I think that Pearl still deserves a much longer sentence. The murder happened in 2004 and she was released in 2009. 5 years for kidnapping, torturing, robbing, helping to rape, and killing a poor woman? The burglary alone is 5 years.

Ryan
Ryan
3 years ago
Reply to  Freedom

Yeah, but Diane deserved to be murdered, right, moron?

Randy perkins
Randy perkins
2 years ago
Reply to  Freedom

How does that exempt her from justice? I have been dealing with PTSD and childhood abuse my entire life and it cause me to go out and murder someone. Bullshit

Mitch
Mitch
1 year ago
Reply to  Freedom

Yes she did she knew right from wrong. Just cause she was abused don’t give her a free pass. She should have served the full 30 years. She could have ran away again and reported to police what her dad was planning. But she wanted the money etc just as much as he did ..

Richard M. Barry
Richard M. Barry
1 year ago
Reply to  Freedom

You’re right, she deserved to die like her old man!

TrueCrimeReader
TrueCrimeReader
2 years ago

She was basically forced to commit the crime by her father who was also raping her and had been grooming her for years. Ppl are quick to compare themselves as “Well I was abused and I never-” but did you abuser ever take to someone house and murder them? What did u do when they did?

Bree
Bree
2 years ago

Sad senseless crime, but you TrueCrimeReader have the point! I’m not sure why throughout the comments BLM was mentioned or why others have compared their abuse experiences to Pearl’s. When did your abuser take you with them to commit a crime of this nature? And the same question, how did you respond? Weird very weird people on the internet. May the victim’s soul rest easy, and her family heart’s be healed.

Em Nicole
Em Nicole
3 years ago

I disagree with the other comments here. This 15 year old child is a victim as well. She was raised like an animal and coerced into this plan by the father. I think 30 years for a child when she clearly was not the mastermind behind this crime was far too harsh. She deserves a chance to heal and turn her life around

Romane
Romane
3 years ago
Reply to  Em Nicole

She was released in 2009. She did around 6 years, not 30. She has her whole life in front of her, unlike the woman she helped rape and murder. I do agree 30 years is too much as she was a child and was abused her whole life and knew nothing else, but 6 is not enough.

nikki
nikki
2 years ago
Reply to  Romane

that girl didnt know anything but what her father taught her, and that was to be his woman and kid at the same time. she was pregnant when they caught them together, and it was her father’s kid… so

Sarah
Sarah
3 years ago
Reply to  Em Nicole

you’re a psychopath. she was 15. she was already regularly raped by her father for two years by then and was pimped out to strange men. she was given alcohol and drugs. Pearl most definitely was a victim. and victims of abuse can end up becoming abusers themselves because it’s all they’ve known. do you understand what’s going through the mind of a 15 year old girl who’s pregnant with her own father’s baby? no, i’m sure you just think that all people who commit murder are just purely evil so you can sleep better at night. this situation is… Read more »

Gableigh39
Gableigh39
3 years ago
Reply to  Sarah

You know who else was raped and abused before being ultimately murdered?? Diane Tilly. Yet, you bleeding hearts have no compassion or sympathy for her suffering. BLM even if they’re viscious killers. Who cares if Pearl was abused!! I was abused as a child too – does that give me license to go commit brutal murders and get away with it?? If she had a conscience, why didn’t she speak up afterward?? Sorry, but we’re all responsible for our own actions in this world and must be held accountable for the choices we make. There are plenty of people who… Read more »

Last edited 3 years ago by Gableigh39
Janet Haney
Janet Haney
3 years ago
Reply to  Gableigh39

I agree
With you 200 percent

Randy perkins
Randy perkins
2 years ago
Reply to  Janet Haney

I agree as well. I was abused by two sisters and a stepmom before I was even ten years old and I didn’t go out and cause he’ll and high water. We did not have therapy when I was growing up but she had all the tools at her hands. No excuse.

Mike t
Mike t
2 years ago
Reply to  Gableigh39

You say you were abused as a child as well but to that extent that Pearl was? Did your dad pimp you out weekly? I’m gonna guess no. So basically because you didn’t react the same stemming from your experiences, no matter how different the comparisons are, there means everyone should be just like you? A little full of ourselves, are ya? If all you can really come up is more elementary name calling, such only shows you didn’t have much of a point to start with. Grow up and then try to discuss such court cases like an adult… Read more »

Kennyboy
Kennyboy
9 months ago
Reply to  Mike t

You mean like your other adult grown up comment about „spit roasting your mom“ because you did not have a good excuse for black on white violence?

Amanda
Amanda
2 months ago
Reply to  Mike t

You are assuming what she said was true when she is a proven liar

LaCaffeinata
LaCaffeinata
1 year ago
Reply to  Gableigh39

The fact that you seem completely unable to show empathy for Pearl indicates that the abuse has traumatized you as well.

Rhonda
Rhonda
3 months ago
Reply to  Sarah

They both are pure evil

Randy perkins
Randy perkins
2 years ago
Reply to  Em Nicole

You’re an idiot to believe that this is a reason to set her free. She deserves to die as well. I was treated like hell from the age of nine and I didn’t do any of this heinous crimes. Put her to sleep, her father should’ve been tortured in prison as well but he took the cowards way out.

Mike t
Mike t
2 years ago
Reply to  Randy perkins

“You’re an idiot because you don’t have the same opinions as me!” That is what you are basically saying. So your experiences should be used to generalize the experiences of other abused kids, despite each case being very different… If you have to start out an opinion with “You’re an idiot…”, that only highlights the superiority complex you have going on. Congrats, you’re a legend in your own mind!

Kennyboy
Kennyboy
9 months ago
Reply to  Mike t

You black aren’t you lol

Kennyboy
Kennyboy
9 months ago
Reply to  Mike t

Says the guy who responded with „spit roasting your mama“ to another person. Yeah clearly you’re an intelligent individual please teach us some more lol

Kennyboy
Kennyboy
9 months ago
Reply to  Randy perkins

Agreed Randy

Mike t
Mike t
2 years ago
Reply to  Em Nicole

Most folks won’t disagree that the daughter should have gotten a longer sentence but 30 years is definitely to much. You must have just skipped the parts where the girl was only 15 and pimped out by her own father. Ah, but to point out such obviousness would make one a “bleeding heart”? If that is what you call being humane and seeing things from more than one view, insult others opinions all you wish but your judgements say more about yourself than anyone else.

Kennyboy
Kennyboy
9 months ago
Reply to  Mike t

They attacked her this horribly for some *cash*. After she helped them so, so much. That child should be euthanized it’s too late for her. Can’t believe she was released with her horrible genetics and pre-dispositions.

Cathy
Cathy
3 years ago

This man should’ve been castrated before jailed.

Helena
Helena
3 years ago

While ideally I would love to believe she has turned her life around and become a different person, I have to be realistic as well and all I can say is that wherever Pearl is, I hope she is not re-offending since it is a known cycle of abuse. PTSD is no excuse to commit heinous acts nor does that warrant justification of zero or minimal consequences. She knew the difference between right and wrong. She was not intellectually disabled that this article made mention of. It’s worth mentioning that Pearl’s whole family that had a hand in her horrific… Read more »

trackback

[…] She inspired those all around her with her generosity and dedication to improving her student’s lives. She had a strong belief that every single student, regardless of their circumstances, could succeed. “Diane was the heart of the school to the teachers as well as the students,” said Bill Sain, a Robbins Academy math teacher. “Diane would never let students give up.”1 […]

Randy perkins
Randy perkins
2 years ago

I am absolutely appalled at this totally needless rape, kidnap and murder. This young lady was absolutely pure of heart and soul and they murderers should’ve both been put to death immediately after the conviction. Where was all the protestors and rioters when these individuals did this heinous crime.

Mike t
Mike t
2 years ago
Reply to  Randy perkins

All the protestors and rioters were to busy spit roasting your mom. Thar answer your inquiry?

TrueCrimeReader
TrueCrimeReader
2 years ago
Reply to  Randy perkins

Where were the protesters** and rioters after? I must of missed that part of the article. I mean I should be mentioned for your comment to have anything to do with this.

Kennyboy
Kennyboy
9 months ago

I agree with the comments. Who cares what the girl went through. She wasn’t relevant and a positive impact on hundreds of human lives. Justice SHOULD be Community-centric. And about the racism stuff.. I’m sorry I am not a racist but I double triple dare anyone showing me a case where a black person was a selfless community savior for white people and then gets raped and murdered by said poor white people. Literally any one case please. AFTER slavery. Those are DIFFERENT issues.

Last edited 9 months ago by Kennyboy
Anna
Anna
5 months ago
Reply to  Kennyboy

“I’m not a racist”
Proceeds to say something racist

Amanda
Amanda
2 months ago
Reply to  Anna

His comment wasn’t racist and you are proven his point

Psst
Psst
9 months ago

Pearl was 15 and I’m sure went through many years of abuse. Her release has conditions. Yes, Dianne was a Saint and rest in peace. I’m sure Dianne would want this for this child.

Amanda
Amanda
2 months ago

She should served her entire time. Doesn’t matter you are abused or not she could have ran away again she helped rspe kidnapped robbed and murder a woman

You may also like:

39
0
Would love your thoughts, please comment.x
()
x