Investigators in Haddon Township are still trying to determine how a 3-year-old boy died.

Toxicology reports on Brendan Creato came back negative for drugs or other chemicals.

The toddler was found dead in a wooded area about a half-mile from his father's home last month. The father had called 911 earlier in the morning to report him missing. Police found the boy's body about three hours later.

A preliminary autopsy performed on the boy came back inconclusive.