Another infant whose care was the subject a D.C. child welfare agency investigation died Monday, hours before the D.C. Council was to convene a hearing on the failings of the District’s tormented child protective services department.

The 4-month-old boy was found unconscious by emergency responders just before 8 a.m. in a residence in the 600 block of 46th Place SE, a police spokesman said. He was declared dead on the scene. An autopsy will determine the cause of death, a spokesman said.