Collingdale police say the July 15 death of Niccolo Varner was the result of acute heroin intoxication. Police and Delaware County prosecutors say the death is under investigation.
Niccolo died after paramedics were called to his home for a report of a child in respiratory distress.
No charges were filed at the time of Varner's death. The boy was at home with his parents, a sibling and a house guest when he was stricken.
At the time, a source told Action News that heroin paraphrenalia was found in the home.
Niccolo's mother spoke to Action News shortly after his death.
"He was the best. He was a good kid! He was the best baby in the world," said Christina Rivera back on July 15th.
"When I went to pick him up, his chest was wet and his chest was blue. So I grabbed him out and started screaming for my husband," she said.
They attempted CPR, but Niccolo was gone.
"Babies don't just die," said Rivera at the time. "He was a very healthy baby. He was running around playing yesterday having fun."