The girl had been visiting Miguel Matias but lived in Pennsylvania with her mother and two sisters. The parents were separated, and Matias had visitation rights. He had a history of emotional problems and was institutionalized after trying to set a car on fire with children inside in Pennsylvania, Kelly said.
The daughter, believed to be in the car when Matias tried to burn it, was the only child visiting him at the apartment, Kelly said.
Kelly couldn't say whether the teen was dead before she was stuffed into the boiler, and the medical examiner's office is to determine the cause of death.
There was no telephone listing for Matias at the address provided by police.