A Georgia man who had blamed the COVID-19 vaccine for making him depressed and suicidal has been identified as the shooter who opened fire late Friday on the U.S. Centers for Disease Control and Prevention headquarters,

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.

The suspect’s father contacted police and identified his son as the possible shooter, the law enforcement official told AP.