Yet Kevin Neal was free and able to use a semi-automatic rifle and two handguns yesterday to shoot 14 people, killing four, in seven different locations across his rural community, including an elementary school, before he died in a shootout with police.
It's not yet clear what the terms of Neal's bail were, and whether he would have been allowed to possess and fire the weapons on his property at the end of a dirt road in Rancho Tehama Reserve. Nor did sheriff's officials give details on the domestic violence call.
Cristal Caravez and her father live across a ravine from the roadway where the gunman and his first victims lived. She said they and others heard constant gunfire from the area of the gunman's house, but couldn't say for sure it was him firing.
"You could hear the yelling. He'd go off the hinges," she said. The shooting, "it would be during the day, during the night, I mean, it didn't matter."
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"The sheriff wouldn't do anything about it," said Juan Caravez.
The gunman's sister, Sheridan Orr, said her brother had struggled with mental illness throughout his life and at times had a violent temper.
She said Neal had "no business" owning firearms.
Tehama County Assistant Sheriff Phil Johnston said the shooter was facing charges of assaulting one of the feuding neighbours in January and that she had a restraining order against him.
Johnston did not comment on the shooter's access to firearms.
The district attorney, Gregg Cohen, told the Sacramento Bee he is prosecuting a man named Kevin Neal in that case.
Neal's mother told The Associated Press her son, who was a marijuana grower, was in a long-running dispute with neighbours he believed were cooking methamphetamine.
The mother, who spoke on condition she be named only as Anne because she fears for her safety, lives in Raleigh, North Carolina, where she raised Neal.
Neal's mother said the neighbour was slightly cut after Neal grabbed a steak knife out of the hand of the neighbour who was threatening him with it.
She wept as she told The Associated Press she spoke to Neal on the phone on Monday.
"Mom it's all over now," she said he told her. "I have done everything I could do and I am fighting against everyone who lives in this area."
She said Neal apologised to her during their brief conversation, she thought for all the money she had spent on him, saying he was "on a cliff" and the people around him were trying to "execute" him.
Police said surveillance video shows the shooter unsuccessfully trying to enter a nearby elementary school after quick-thinking staff members locked the outside doors and barricaded themselves inside when they heard gunshots.
Johnston said the gunman spent about six minutes shooting into Rancho Tehama Elementary School before driving off to continue shooting elsewhere. Johnston said one student was shot but is expected to survive.
He said the 45-minute rampage ended when a patrol car rammed the stolen vehicle the shooter was driving and killed him in a shootout.
Witnesses reported hearing gunshots and children screaming at the school, which has one class of students from kindergarten through fifth grade.
The shootings occurred in the rural community of Rancho Tehama Reserve, a homeowners association in a sparsely populated area of rolling oak woodlands dotted with grazing cattle about 130 miles north of Sacramento.