The suspected shooter who opened fire at a Rhode Island high school hockey arena on Monday evening is a 56-year-old man who identified as transgender and made a number of alarming posts on social media prior to the shooting.

Robert Dorgan, who also went by the name “Roberta,” laid multiple complaints with police alleging assaults, intimidation and threats to kill from different relatives, court documents reveal

A shooting at a school hockey game in Pawtucket left multiple dead; teams from Blackstone Valley Schools were playing, and the suspect later died.