Baked to Death? NY Inmate's Jail Mystery

Jerome Murdough, 56, a homeless former marine with mental illness, died in an overheated jail cell.
3:00 | 03/19/14

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Transcript for Baked to Death? NY Inmate's Jail Mystery
Death a 56 year old Jerome Murdoch. Is under investigation tonight advocates for the mentally ill since he should not have been arrested in the first place -- once. At rikers they say he should have been closely watched by corrections officers because of his mental illness. Investigative reporter -- Wallace -- right now with our lead story. -- -- -- some medical Examiner's office has not yet determined your -- Dennis cause a dip Murtaza cause of death I should say. But the fact that he died at all is causing a firestorm he was mentally ill in a unit that was supposed to be closely supervised. And sources say his cell was close to 100 degree. A look at how far this investigation goes yeah neverland meaning every -- questions. Cheryl Warner didn't find out about the death of her brother 56 year old Jerome Murdoch -- here and they dated photo until last week. He died last month on Rikers Island. The family who lives in the area says they have yet to hear from city correction officials about exactly how the mentally ill man died in a sweltering jail cell in this special observation unit. He's in -- single. He's -- monitor. -- -- -- -- A corrections statement -- a preliminary investigation shows there were an usually high temperatures and mr. murder us sell it may have been due to malfunctioning equipment. I really do you know you've got a folk hero you don't put nobody. It's a human being someone who could -- in that situation. -- out was a marine veteran with a drinking problem who bounced around family apartments his family says he was harmless. He would not -- he wasn't file no all Newton won't back to except nobody else. Murdoch was picked up on a trespassing charge while sleeping in a stairwell of an upper east side project a week later he was debt. I think I think everybody has dropped what looked like a -- a -- and jailed for me back to this -- right. -- had gotten some help some place until you've lived up now. The department says it is looking into all of the circumstances of Murdoch's death including issues at -- performance and adequacy of procedures. I -- -- asked not cover it has known as Mosul was so. Don't think that they go if you murder my brother. -- -- -- -- -- -- -- The correction department says it has taken remedial action to correct mechanical problems in all of its jails. By the way the mayor has appointed a new commissioner who starts in April and we are told he will -- looking at all aspects of the system to make it better. Remember if you have a story about -- tip about this story or any other. Give us -- call at 877 -- news or you can always email us at the dot investigators at ABC dot com.

This transcript has been automatically generated and may not be 100% accurate.

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