SACRAMENTO, Calif. (AP) — The FBI said Friday it found a martyrdom letter and several guns in the home of a former Marine who said he wanted to carry out a Christmas Day attack on San Francisco’s Pier 39, a popular tourist destination.

Everitt Aaron Jameson, 26, a Modesto tow-truck driver, was charged Friday with attempting to provide material support to a foreign terrorist organization.

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, which is packed with restaurants, bars and souvenir shops, because it is heavily crowded, according to an FBI affidavit.

He told the undercover agent Christmas Day would be “the perfect day to commit the attack” and he “did not need an escape plan because he was ready to die,” the affidavit said.

He asked for help obtaining a fully automatic military assault rifle, either an M-16 or an AK-47, along with ammunition and materials to make explosives, including nails, timers and remote detonators, the affidavit said.

However, Jameson told the undercover agent Monday he had reconsidered and felt he could not carry out the attack after all, the affidavit says. He denied the allegations during a hearing in federal court Friday.

His father, Gordon Jameson, said he believes the FBI has the facts wrong.

“He wouldn’t do that to innocent people,” the elder Jameson told the Merced Sun-Star. “He’s a loving, kind person that would never hurt nobody.”

Everitt Jameson had posted radical jihadist messages online, including expressing support for the Halloween terror attack in New York City in which a driver used his truck to kill eight people, the FBI said.

“I’m glad to know we Muslims are finally hitting back,” Jameson told an agency informant. He offered to use his tow truck to support the cause, the affidavit says.

The FBI began investigating in mid-September when it learned Jameson was expressing support for posts that favored terrorism or the Islamic State group.

Agents raided his home Wednesday, finding a martyr’s letter signed with an Islamic variation of his name, along with his last will and testament updated in November. They also found fireworks, two rifles and a 9mm handgun.

During the search, Jameson “stated his support of ISIS and terrorism and discussed aspects of the plan to carry out an attack, noting that he would be happy if an attack was carried out,” the affidavit says.