FBI agents revealed they interviewed the former employee who shot and killed eight people at a FedEx facility in Indianapolis.

According to the bureau, the shooter’s mother called police last year to say that her son might commit “suicide by cop.”

The Marion County Coroner’s office identified the victims who died as Matthew R. Alexander, 32; Samaria Blackwell, 19; Amarjeet Johal, 66; Jaswinder Kaur, 64; Jaswinder Singh, 68; Amarjit Sekhon, 48; Karli Smith, 19; and John Weisert, 74.

The shooter was identified as Brandon Scott Hole, 19, of Indianapolis, Deputy Police Chief Craig McCartt told a news conference. Investigators searched a home in Indianapolis associated with Hole and seized evidence, including desktop computers and other electronic media, McCartt said.

Hole began firing randomly at people in the parking lot of the FedEx facility late Thursday, killing four, before entering the building, fatally shooting four more people and then turning the gun on himself, McCartt said. He said he did not know if Hole owned the gun legally.

“There was no confrontation with anyone that was there,” he said. “There was no disturbance, there was no argument. He just appeared to randomly start shooting.”

McCartt said that there were at least 100 people in the facility at the time and that many were changing shifts or were on their dinner break.

Several people were wounded, including five who were taken to the hospital.

President Joe Biden said he had been briefed on the shooting and called gun violence “an epidemic” in the U.S.