We now know who made the call to 911 after Don Cornelius shot himself in the head early this morning -- it was his own son.
Law enforcement sources tell TMZ ... one of Don's two sons made the call around 4:00 AM ... and paramedics were immediately dispatched to Don's Sherman Oaks home in an effort to save his life.
Don was transported to a nearby hospital -- where he was later pronounced dead.
Cornelius was 75 years old.
Waiting for your permission to load the comments.