Yvonne, Carlos & Benjamin Cisneros Found Dead in Colorado Home; James Perry Acquitted of Homicide, Murdered in New York (January 12, 1979)

When a pregnant mother and her young sons are brutally slain, pressure mounts for the CSPD to catch the monster who did it. After a city-wide manhunt, Kenda begins to tighten the noose on a prime suspect, but what happens next will shock him to his core. -The Master Key, Homicide Hunter (S4,E8)

The neighbor was supposed to watch Yvonne Cisneros’ two children Carlos and Benjamin but they never showed up. She was concerned and went to check on them but there was no answer. Yvonne, 22, and the two children were found dead with multiple stab wounds by Ben Cisneros in their Colorado Springs apartment on January 12, 1979. Kenda was called to investigate the triple homicide. Yvonne was strangled and stabbed 60 times in the chest, back and abdomen; there was evidence of a sexual assault. Two-year-old Benjamin had been stabbed 22 times. And 4-year-old Carlos was stabbed 19 times; he also had crushing injuries to the head made with a barbell. This was a vicious frenzied attack. They were stabbed with a tool; the evidence lead to one perpetrator.

Ben Cisneros was the number one suspect initially. Ben Cisneros was in the military. He met Yvonne when she was 16. They were planning on having another child. Yvonne was 3 months pregnant when she was murdered. Ben was assigned to the Butts Army Air Field at Fort Carson; he was an air traffic controller. Ben Cisneros was at work at the time of the crime and was quickly ruled out by Kenda. Ben was concerned when Yvonne didn’t answer the phone so when his shift ended he went straight home. The Army could back up his alibi. The coroner determined the deaths were between 9 and 11 a.m. There was no forced entry so the killer had the key or was let into the apartment. Then a witness reported to Kenda that he saw the maintenance man enter Ben and Yvonne Cisneros’ apartment the morning of the homicides.

Kenda got a warrant to search the premises of James Joseph Perry. His common law wife said he was not home at the time of the crime. She was employed as a cleaner at the apartment building and had a master key but when she went to retrieve it, it was missing. In the laundry room, Kenda found a bottle of bleach and the clothes that matched the description provided by the witness. Kenda took the clothes for analysis at the crime lab but he knew it most likely would not show anything because bleach destroys evidence. Kenda needed to directly connect Perry to the crime. They found a pen with paint splatter at the scene of the crime. Kenda wanted to compare the paint Perry used on his last job to the paint on the pen they found. Kenda confiscated the paint cans from the maintenance building as evidence.

When detectives met up with Jimmy, they noticed paint on his watch too. Perry was arrested and immediately asked for an attorney. Kenda believed Perry took the master key, quietly entered the Cisneros’ apartment, and then attacked Yvonne first. Perry raped her, attacked her with a weapon, and killed her. He then attacked and killed the children because they witnessed what he did. He went home, bleached his clothes and went about his day. The lab results supported the prosecutions theory. The paint from the pen matched the paint Perry last used. At Perry’s trial, the jury reached a verdict and found the defendant not guilty on all counts. The investigators were shocked and felt like they let Ben, Yvonne and the children down. After the trial, James Perry moved back to New York City. Several months later, Kenda learned someone threw James Joseph Perry out of a 10th floor window at an apartment in the Bronx. He was dead. Karma?

Source: The Master Key, Homicide Hunter, Investigation Discovery

Editor’s note: With a cable subscription, you can download the free ID Go app and watch Investigation Discovery programming at your convenience. And for those who do not have cable, you can watch “unlocked” episodes on the ID Go app including the latest premieres. For those who prefer commercial free programming during your binge session, Prime Video has an ID channel: ‘True Crime Files by Investigation Discovery” available for $3.99 a month. It’s a compilation of older seasons but totally worth the cost if you are a true crime addict. Download the ID Go app or purchase ID True Crime Files & binge away.

Related Links:
The Master Key | Homicide Hunter | Investigation Discovery (S4,E8)
The Master Key | Homicide Hunter | Investigation Discovery (website)
The Master Key | Homicide Hunter | Investigation Discovery (Amazon)
The Master Key | Homicide Hunter | Investigation Discovery (Hulu)
Homicide Hunter Premiered ‘The Master Key’ on ID: Military Family Found Murdered in Colorado Springs Home (October 14, 2014)
Homicide Hunter: 15 Active Duty Military and Veteran Murder Cases Featured on Investigation Discovery

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