VIDEO: Father of foiled SF terror attack suspect: 'Unreal, I really couldn't believe it'
The FBI arrested Everitt Aaron Jameson, who is a tow truck driver and lives in Modesto. According to a handwritten letter obtained by the FBI, Jameson also referred to himself as Abdallah adu Everitt ibn Gordon.
Jameson appeared in court Friday, but did not enter a plea.
RELATED: New ISIS video names targets in San Francisco, Las Vegas
The 26-year-old is charged with attempting to supply support to a foreign terrorist organization, specifically the Islamic State. According to FBI documents, he posted and liked pro-ISIS and pro-terrorism content on Facebook.
The suspect reportedly picked the Pier 39 location because he "had been there before and knew it was a heavily crowded area." He added that it would be easy to "funnel" people into an area where he could inflict casualties.
The documents cite an FBI informant who said Jameson was inspired by the New York terror attack on Oct. 31, when a man drove into a crowd and killed eight people, and the deadly 2015 shooting in San Bernardino.
RELATED: Guns, ammo, will and letter seized from home of Pier 39 Terror Plot suspect
And according to the documents, the suspect was discharged from the Marine Corps. He had prior military experience with a "sharpshooter" rifle qualification and expertise with rifle marksmanship.
Officials say Jameson was talking to an undercover FBI agent. They add that he was arrested earlier this week and a search warrant was executed at his Modesto home. Several firearms were found, along with fireworks.
ABC7 News contacted officials at Pier 39 to ask for a response, they say they did not know about this plot.
COURT DOCUMENT: FBI criminal complaint for SF terror plot suspect
San Francisco police released a statement on Friday afternoon that reads: "The San Francisco Police Department was notified by the FBI about this investigation several days ago and we remain in contact with our local, state and federal partners as this case proceeds. The safety of all San Francisco residents and visitors is our top priority. As we have stated in previous weeks, during the holiday season the public will notice an increased law enforcement presence in shopping corridors and at our City's attractions. As always, "if you see something, say something." We encourage the community to contact officers or 9-1-1 to report suspicious activity."
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Towing company in Ceres where Suspect in San Francisco terror plot worked is preparing a statement pic.twitter.com/95DBYktDwP— Gene Haagenson (@GeneABC30) December 22, 2017
Just spoke w/suspect's estranged wife's grandfather who raised her, says she is prison and that the state took the couple's two kids (p.1) pic.twitter.com/OylnbD9FvV— Melanie Woodrow (@MelanieWoodrow) December 22, 2017
He wasn't sure what she was convicted on. Our ABC Fresno partners say suspect's dad told them something involving a knife (p.2)— Melanie Woodrow (@MelanieWoodrow) December 22, 2017
What agents recovered at suspect's home - letter, last will & testament, firearms and rounds pic.twitter.com/NbmcUgHDfW— Melanie Woodrow (@MelanieWoodrow) December 22, 2017
According to FBI documents: Jameson stated "Christmas was the perfect day". He also said "he did not need an escape plan because he was ready to die". @abc7newsbayarea— Jessica Castro (@JessicaABC7) December 22, 2017
MORE: Documents show suspect, Jameson, had prior military experience + had "sharpshooter" rifle qualification and expertise with rifle marksmanship. cc:@abc7newsbayarea— Jessica Castro (@JessicaABC7) December 22, 2017
Breaking: Criminal complaint shows agents stopped Modesto man from Xmas terror plot at pier 39. Documents say he was inspired by NYC truck attack & San Bernardino shooting. Complaint says he is a former Marine with 'sharpshooter' qualification. More: https://t.co/9yYmnyfQNe pic.twitter.com/ZQDMUsKiQs— Reggie Aqui (@reggieaqui) December 22, 2017