WOODLAND HILLS, Calif. (KTLA) -- A 23-year old man is facing murder charges after allegedly providing heroin that killed a 13-year old boy.
The boy's body was discovered Wednesday morning at a home in the 5300 block of Manton Avenue in Woodland Hills.
Brett Cronin, 23, was arrested later that night after admitting that the heroin was his.
The boy, who hasn't been identified, was spending the night at his friend's house.
Neighbors say Cronin lived at the home with his grandmother, father, extended family and several young children.
Police originally thought Cronin had injected the teen, but now they think otherwise.
"Now it seems that the victim may have voluntarily injected the heroin that killed him," LAPD Officer Karen Rayner said.
The victim reportedly went into convulsions soon after the injection.
Cronin and another 13 year-old reportedly put the victim into a bed.
No one called for help until 9 a.m. Wednesday morning, but by then boy was dead.
An addiction expert told KTLA that a fatal dose of heroin would have caused the teen to stop breathing, fall into cardiac arrest and die.
Police say those are symptoms an adult should have noticed, and so they have charged Cronin with murder.
Off camera, neighbors said that Cronin's addictions were not a secret and that he often talked about "a sickness."
One of his favorite quotes listed on his Facebook page is: "I'd hate to advocate drugs and alcohol, but they've always worked for me."
Cronin's family was at the home during the incident, but were apparently unaware of what had happened.
"It's tragic and we are very sad about it," the suspect's uncle told KTLA.
"If the question is did we know that this was going on... absolutely not," he added.
Cronin is being held on $1 million bail.
Anyone with information about this crime is urged to call Topanga Area Homicide Detectives at (818) 756-4869.
After hours and on weekends, calls may be directed to (818) 756-4800.