Robert Dorgan, 56, the suspect in a fatal shooting at a Rhode Island high school hockey game on Monday, had shared “thousands” of antisemitic and racist posts online, according to the New York Post.

Dorgan, who identified as “Roberta Esposito,” allegedly opened fire during a game at an ice rink in Pawtucket, killing two people and wounding three others before taking his own life, authorities said.

The Post reported that Dorgan’s social media account included “worrying remarks” against anti-trans hate as well as extremist and racially offensive content, including support for Nazi ideology. One day before the shooting, he responded to a video praising Adolf Hitler using an Asian slur.