DULUTH, Minn. (AP) _ A medical examiner has ruled the death of a 5-week-old Duluth boy this summer a homicide.

The Hennepin County medical examiner's office says Jamal Trey Chaterlays-Simpson died from head trauma.

According to the report, the boy was injured in Duluth and died Aug. 10 at a Minneapolis hospital.

Duluth police are investigating.