Authorities in Buffalo, New York, have launched a homicide investigation after the body of a missing 12-year-old boy was discovered in an attic on Friday, nearly four years after he was reported missing.

A maintenance worker called Buffalo police Friday morning to report that hed found a body later confirmed to be that of Jaylen Griffin in the attic of an apartment house where he was working, according to local NBC affiliate WGRZ .

Jaylen was reportedly last seen on Aug. 4, 2020, when he left his home to go to a grocery store and never returned.