Friend of San Bernardino gunman appears in court

Marquez had purchased explosive powder, which was later found in Farook's home.

Officials also accused Marquez of "defrauding immigration authorities by entering into a sham marriage with a member of Farook's family".

He clearly continued to think about his past association with Farook as he posted on Facebook a month before the attacks.

BENNETT: It's been really interesting to read the charging documents closely and see how detailed the two had gotten in their plans in 2011, 2012 to launch attacks.

Without explaining how the call began, the excerpt starts with the 911 operator asking Marquez why he felt like he wanted to kill himself. When the operator asked why, Marquez responded: "I don't know".

Decker said there was no evidence Marquez took part in the attack on a holiday party at a social services center or had prior knowledge.

When Enrique Marquez realized that his friend and neighbor Syed Rizwan Farook had used Marquez's guns to slaughter 14 people, he went out and drank nine beers.

And Marquez's family did not learn of the union until he had checked into Harbor-UCLA Medical Center after the shooting, according to court papers.

No plea was entered and he was ordered held until a bail hearing Monday in U.S. District Court.

Known as mild-mannered and impressionable, Marquez was undergoing an unnerving transformation behind the scenes, according to the affidavit.

According to the affidavit, Marquez told investigators that Farook was exposing him to extremist views and ideas years ago.

The duo, who had become adherents to radicalized Islam ideology as neighbors in Riverside, plotted in 2011 and 2012 to maximize carnage by using pipe bombs and guns to kill innocent people at a campus cafeteria and those stuck in rush hour traffic, court documents said. The affidavit said Farook was registered as a student there from about 2004 to 2010.

Attorney E. Martin Estrada, a former federal prosecutor in Los Angeles, said the admissibility of Marquez's statements to the FBI will likely be challenged by defense lawyers, but if the statements are allowed in court, they give prosecutors a very strong case because of corroborating evidence.

After trapping the cars, Farook planned to walk along the freeway and gun down motorists in their vehicles.

Around the same time, the two planned a "rush-hour" attack on a stretch of local highway that lacked exits. The combination of Farook's involvement with the Dar Al Uloom Al Islamiyah Mosque and Malik's attendance at al-Huda would have indicated, at minimum an urgent need for comprehensive screening.

Marquez, 24, has told investigators that he and Farook had been discussing radical Islam since 2007.

Few at Morgan's Tavern believed Marquez's claim that he and a Russian émigré had tied the knot, recalled Nick Rodriguez, once a regular at the pub.

Marquez told investigators he stopped plotting with Farook after 2012 for "a variety of reasons", including the arrest of three men that November in Southern California on suspicion of plotting to kill Americans in Afghanistan. The sisters are from Russian Federation and came to the United States on J-1 visas - commonly used for educational and cultural programs. Marquez was paid $200 a month to stay married to her so she could retain legal status. Each of those charges carries 10-year maximum penalties.

It also says that Farook's discussions and plotting occurred as long as four years before the San Bernardino attack, predating both his contact with his future wife, Tashfeen Malik and the formal declaration of the Islamic State.

His mother, who declined a formal interview with CNN, at one point told a group of reporters gathered in front of the family home that her son was "a good boy".

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