A man killed eight of his relatives, including four children, as they gathered for Sunday dinner at a home outside Billings, Montana, weeks after his parents asked him to move out, a family member told The Associated Press.

Brad Ireland, whose former wife and two children were among the dead, identified the shooter as 44-year-old Alan Smith. Smith's parents, who were also killed, had asked him to move out, but he returned on Sunday and opened fire, Ireland said.

The victims represented four generations of the blended family, ranging from a great-grandmother in her 90s who used a wheelchair to a 7-year-old girl, according to Jennifer Mercer, a neighbor and family friend who set up an online fundraiser to help cover funeral costs and other expenses, and was authorized to release these details.

“There were many red flags and many people spoke out,” said Ireland, who lives in Arizona. “No one listened.”

Alan Smith was a “hermit” who spent most of his days in his room on his computer, Ireland said.

“No one knew what he did in there 24/7,” he said.

Alan Smith had attended Eastern Washington University but had been unable to find or hold a job. A search of criminal records in Montana and Washington found no record Alan Smith had ever been arrested or charged with a crime