Law enforcement has identified 19-year-old Santino William Legan as the suspected gunman behind the deadly shooting at the Gilroy Garlic Festival in northern California, according to a Monday report from CBS News.

Web archive of what appears to be Legan’s now-deleted Instagram account show that he identified as Italian and Iranian. His most recent post was a photo of a sign featuring Smokey the Bear and a sign warning of high fire danger, reported Heavy.com.

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“Read Might Is Right by Ragnar Redbeard,” the caption read. “Why overcrowd towns and pave more open space to make more room for hordes of mestizos and Silicon Valley white twats?”

“Might Is Right” is a book that’s more than 100 years old that has taken hold among white supremacists.

At least three people are dead and 15 are injured after a shooter opened fire at the final day of the festival, which draws crowds from out-of-state. Law enforcement are expected to share more information at a press conference at 10 a.m. local time.

Police shot and killed the gunman within a minute of shots going off, reported CBS News. It’s unknown whether he acted alone, although police believe an additional suspect may have been involved, reported NBC News.

One of the victims was 6-year-old Stephen Romero. His mother and grandmother were also hurt, reported NBC News.