Ian David Long, 28, lived in Newbury Park, not far from the club where he threw smoke bombs and rained bullets on a crowd of more than a hundred people Wednesday night.
Sheriff Geoff Dean said his department had had several interactions with Long, including a call to his home in April for a complaint of disturbing the peace. Deputies at the time said Long was irate and acting irrationally, Dean said. They called in mental health professionals to evaluate him, and they concluded he did not need to be taken into custody.
In the neighborhood where Long lived, residents said they were well aware of his problems.
Richard Berge, 77, said the former Marine had PTSD and was known to kick in the walls of the home. Long lived with his mother, Berge said.