LOS ANGELES - The man who bought the assault rifles used by his friend in the San Bernardino massacre was charged Thursday with terrorism-related counts.
The FBI arrested Enrique Marquez, 24, on charges of conspiring with Syed Rizwan Farook to commit terrorist attacks in 2011 and 2012 that they never carried out. Marquez was Farook's next-door neighbor and longtime friend who converted to Islam and was radicalized by Farook, federal prosecutors said.
Marquez also was charged with illegally purchasing two assault rifles used by Farook and his wife, Tashfeen Malik, to kill 14 people at a holiday gathering of Farook's health department coworkers on Dec. 2. The shooters died hours later in a gun battle with police.
Marquez had no role in the attack, but prosecutors said the guns and bomb-making materials he bought that the couple planned to detonate linked him to the killings.
"While there currently is no evidence that Mr. Marquez participated in the Dec. 2 attack or had advance knowledge of it, his prior purchase of the firearms and ongoing failure to warn authorities about Farook's intent to commit mass murder had fatal consequences," U.S. Attorney Eileen Decker said.
Authorities previously said Marquez had legally purchased the high-powered guns.
The FBI investigated the rampage as an act of terrorism and said the Muslim couple were radicalized before they met online and communicated privately about jihad and martyrdom before they married.
President Obama said he was briefed on the investigation Thursday and reiterated the federal government's commitment to find answers to all the unknowns in the case.
Marquez had deep ties with Farook that extended to a family connection. The two grew up next door to each other in Riverside and then became related through marriage.
Both men were witnesses at the wedding of Farook's brother, Raheel, to a Russian woman in 2011, according to Riverside County marriage records.
Last year, Marquez married the sister of Raheel Farook's wife. That made Marquez and Raheel Farook brothers-in-law and gave Marquez and Syed Rizwan Farook a sister-in-law in common.
Marquez faces an additional immigration charge for a sham marriage.
Records show that Marquez married Mariya Chernykh at a ceremony at the Islamic Society of Corona-Norco, though the mosque's facility manager denied it occurred there.
Marquez was not a member of that mosque, Azmi Hasan said. Marquez worshipped there three to four times over seven years, Hasan said.
Right after the shooting, Marquez called his mother to say he was safe but that he wouldn't be coming home, neighbor Lorena Aguirre said. He later checked into a mental health facility.
Three days after the attack, federal agents raided his mother's house in Riverside, a city near San Bernardino that is about 60 miles east of Los Angeles.
Armida Chacon has said her son is a good person who loved to hang out with friends and go to parties, according to the Los Angeles Times.
"I don't know how this happened. . . . My world is upside-down," she said tearfully.
When asked about Syed Farook, she said her son was friends with him and "nothing more."
Marquez's friends were shocked to learn he was linked to the attack by the weapons and described him as a friendly, easygoing person who was not religious and rarely discussed his family or marriage.
"I still can't believe this is going on," said Viviana Ramirez, who met Marquez through an online forum when they studied at Riverside Community College. "I just want people to know he's not a bad person."