Aug. 6 (UPI) -- An official said Tuesday that the FBI started a domestic terrorism investigation into a California festival shooting that killed three people more than a week ago.
The gunman killed 6-year-old Stephen Romero, 13-year-old Keyla Salazar and 25-year-old Trevor Irby, and injured several others July 28 at a garlic festival in Gilroy, 30 miles southeast of San Jose. Police stopped the shooting by opening fire on Legan, who then killed himself.
"Due to the discovery of the target list, as well as other information we have encountered in this investigation, the FBI has opened a full domestic terrorism investigation into this mass shooting," Bennett told reporters. "We have not made a final investigative conclusion into motive of the shooter. However, we have uncovered evidence throughout the course of our investigation that the shooter was exploring violent ideologies."
Bennett added that several people have asked why the domestic terrorism investigation wasn't opened sooner amid reports of white supremacist and anti-Semitic propaganda tied to his social media account and anti-Islam literature and supplies for a large-scale attack found in his Nevada home.
"Having a belief system and also committing an act of violence does not necessarily make that an act of terrorism nor does it give a clear motive," Bennett said. "We have to determine that individual's ideology caused them to commit the act of violence in furtherance of their political and social goals."
Bennett added that items seized from Legan's home in Nevada ran the ideological gamut.
Investigators are interviewing Legan's relatives and associates, and reviewing digital media and materials seized from his residence, including several hard drives, a computer tower, books and a letter from a relative, a receipt of a search warrant released by Nevada authorities shows.
"We are still working to determine the motive in this crime," Bennett said. "However, due to the information we have found thus far, the FBI has opened a full domestic terrorism investigation."
Bennett said among the targets nationwide were religious institutions, federal buildings, courthouses, and political organizations from both major political parties, and the Gilroy Garlic Festival.
Even though the threat "has been mitigated" by the suspect's death, Bennett said the FBI still has the responsibility to notify those on the list of the potential threat.
Out of respect for their privacy and safety, Bennett did not identify the names of those on the list.