<p>Three people are in custody as a result of a homicide investigation after a 5-year-old boy was found fatally shot in south suburban Riverdale Tuesday, according to Riverdale police.</p><p>Officers responded to a home in the 13900 block of South State Street at 6:05 p.m. after receiving a report that a child had been shot, police said. They found a 5-year-old boy who was pronounced dead at the scene.</p><p>The Cook County Medical Examiner's Office identified him as 5 -year-old Roson Garret.</p><p>Three family members who were inside the home at the time of the shooting have been arrested, police said.