As I mentioned earlier in here. Maine is insanely easy to purchase a gun. It was obvious these were legally purchased guns.
The failure is that it was known he had a mental illness, and from what I read the police were warned about him. The police failed.
Also what Ive read about Maine is that if you are involuntarily admitted to a psyche ward, you lose tour guns. So, my question is, was he ever involuntarily admitted? I believe I read somewhere that atvine point he was in an instition for his mental problems.
Edit:
I just found this quote. The system kinda worked...but once he was rejected for the silencer, they probably ahould have followed up on him...
He came in and filled out the form, he checked off a box that incriminated himself saying that he was in an institution,” Rick LaChapelle, owner of Coastal Defense Firearms, said. “Our staff was fantastic, let him finish filling out the form, and said, ‘I'm sorry, Mr. Card, we cannot give you this… at this point in time, we cannot release this silencer to you because of the answers that you've given us.”