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.
I always point this out when these incidences come up. We can’t talk about mental illness if we don’t address that this only seems to happen to a very particular set of men. Jumping immediately to blaming mental illness stigmatizes neurodivergence everywhere, and the cultural chudeology gets off the hook every time!