A day after Jennifer Hudson‘s mother and brother were found murdered, a young boy remains missing while a possible suspect sits in custody.

Late Friday night, William Balfour - the singer’s estranged brother-in-law - was located by the Chicago Police Department hours after the bodies of 57-year-old Darnell Donerson (Jennifer’s mother) and 29-year-old Jason Hudson were found. Although no charges have yet been filed, officers identified Balfour as a person of interest in the murders and in the disappearance of Julian King, his 7-year-old stepson.

The crime scene was discovered yesterday afternoon when Jennifer’s sister, Julia Hudson, returned to the house after work. When police arrived to the South Side home, they found a woman with a gunshot wound to her head in the living room and a man with a gunshot wound to his chest in a bedroom. An Amber Alert was issued shortly thereafter for King. Based on earlier reports of gunshots fired, officers believe the incident may have actually occurred around 9:00 in the morning.