Federal authorities have launched a domestic terrorism investigation into the Gilroy Garlic Festival shooting in California that left three dead, authorities said at a news conference on Tuesday.
The move came as officials are still trying to determine a motive for the attack and are digging deeper into the background of the gunman, who shot and killed himself according to the county medical examiner, reports the Los Angeles Times.
The FBI has seized from the gunman’s residence what a law enforcement source described as extremist materials. But John F. Bennett, special agent in charge of the bureau’s San Francisco office, says authorities have not determined whether he was a white nationalist, but they have not ruled it out either. Written materials taken from the gunman's residence in Nevada ran the ideological gamut, Bennett said.
Bennett said Thursday that there is no indication the gunman targeted festival attendees of a particular race. Shortly before the attack, he promoted on Instagram a 19th century screed often championed by white supremacists, and used a slur to refer to mixed-race people. The gunman, whose family lives in Gilroy, identified himself on Instagram as of Italian and Iranian heritage.