The suspect is believed to be Robert Card, a 20-year US Army veteran from Bowdoin Center, Maine.
(according to Telegrams so take with grain of salt)
EDIT: Name confirmed by news.
According to law enforcement, CARD recently reported mental health issues to include hearing voices and threats to shoot up the National Guard Base in Saco, ME.
Dudes twitter was shared on reddit, of course he was a Republican and also a transphobe. But then i refreshed and the account was “suspended.”
https://twitter.com/RobertC20041800/with_replies?t=F8McyP5jkWQqNIzeeIVFzQ&s=09
totally no motive at all.
although one tweet he liked was one from Ravens QB Lamar Jackson about mental health awareness. so much for that.