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.
Okay, but having a gun makes me personally feel a lot more secure and powerful. I honestly can’t interact with the outside world unless I have the power to end the life of everyone around me when I go out.