What we know about the suspect in the deadly Buffalo supermarket shooting

The official was not authorized to publicly discuss details of the investigation and spoke to AP on condition of anonymity.LATEST:'Heinous' shooting in Buffalo being investigated as hate crime, extremism MOTIVE:Buffalo attack highlights most lethal domestic threat: Extremist violenceHere's what we know about the suspect: Gendron threatened an attack at his high school last year, resulting in a referral for a mental health evaluation, a law enforcement official told USA TODAY on Sunday. The final day of classes at the Town of Dickinson community college is Tuesday.Early investigations point to a racist motive in the killings.“This individual came here with the express purpose of taking as many Black lives as he could,” Buffalo Mayor Byron Brown said at a news conference Sunday.U.S. Rep. Brian Higgins, D-N.Y., a Buffalo native, said the evidence gathered points to an “explicit act of racially motivated violence.”Citing briefings with law enforcement officials, Higgins said the suspect carried an assault weapon inscribed with a racial epithet.“I was on site for the last three hours, and I listened carefully to what the FBI, police, the district attorney and the U.S. attorney had to say,” Higgins told USA TODAY.