The gunman in the fatal attack on the US Centers for Disease Control and Prevention took his own life after he unsuccessfully attempted to leave the building from where he opened fire, according to a law enforcement source with direct knowledge of the investigation.

Patrick White is believed to have struggled with his mental health, according to that information. As he grappled with those issues, sources said, White had become increasingly fixated on the COVID-19 vaccine as a source of his grievances.