A mentally ill homeless man and Marine veteran was found dead in his Rikers Island jail cell, where he apparently succumbed to the 100 degree temperature generated by malfunctioning equipment.

The homeless man, 56-year-old Jerome Murdough, was arrested for trespassing after he spent the night sleeping inside the stairwell of a Harlem housing project. He was taking anti-psychotic medicine, which may have made him more susceptible to extreme heat, according to the Associated Press.

After an equipment malfunction, the temperature in his cell rose to 100 degrees. While the exact cause of death has not yet been released, anonymous officials said the heat was clearly to blame.

“He basically baked to death,” said an anonymous jail official.

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