Jameson told an undercover agent he believed to be associated with senior leadership of the Islamic State group that he wanted to conduct a violent attack on Pier 39 in San Francisco because it was heavily crowded, according to an Federal Bureau of Investigation affidavit. At the same meeting, Jameson allegedly suggested a bomb-and-gun attack on Pier 39, a popular tourist area on the San Francisco waterfront.
The complaint notes that Jameson described Christmas Day as a "perfect day" to attack, and that he "espoused radical jihadi beliefs, including authoring social media posts that are supportive of terrorism, communicating with people he believes share his jihadi views and offering to provide services to such people".
Agents found a suicide note that mentioned President Donald Trump and giving Jerusalem to the Jews.
The FBI began investigating in mid-September when it learned that Jameson was expressing support for posts that favoured terrorism or the Islamic State group.
Jameson, a tow truck driver who lives in Modesto, offered to make use of his vehicle. Jameson told the agent, "I also don't think I can do this after all".
Jameson planned to carry out the attack in response to Islamic State's recent call for attacks on Western cities around the Christmas holiday.
The FBI confirmed that Jameson attended U.S. Marine Corps basic training and earned a "sharpshooter" rifle qualification.
Jameson told the informant that he was a soldier in the "Kuffar army" before he reverted and that he was trained in combat and things of war.
Authorities ultimately searched his Modesto home on Wednesday. He told an undercover agent that America "needed another attack like NY or San Bernardino".
On Dec. 16, McKinney claimed Jameson met with a second undercover Federal Bureau of Investigation agent and "expressed that he was willing to do anything for 'the cause, '" including traveling to fight with ISIS in Syria.
She added, "We will not allow the thwarted attempts of one unsafe individual to disrupt our way of life". They found a a couple of.45-caliber magazines, a Rugers model M77 and a Winchester 22. caliber rifle, ammunitions and some fireworks.
Attorney General Jeff Sessions applauded law enforcement officials in a statement Friday.