Actor and comedian Robin Williams died at his Northern California home Monday. He was 63-years-old. In a statement, his representative said Williams had been "battling severe depression of late."

Going public with depression

The Marin County, California, Sheriff's office says an investigation is underway, but suspect his death is "a suicide due to asphyxia."

CNN's Don Lemon and HLN's Dr. Drew discuss Williams' battle with mental illness.