According to the court document, Jameson was inspired by the October 31 NY terror attack that left eight people dead when a man drove into a crowd.
"Jameson clarified that he likewise wanted to utilize explosives and depicted a play in which explosives could "passage" or "channel" individuals into an area where Jameson could cause setbacks", McKinney composed.
Court documents filed Friday state Jameson, a tow truck driver, asked an Federal Bureau of Investigation agent he believed to be an ISIS leader for an assault rifle, ammunition, and pipe bomb materials, the Los Angeles Times reports.
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Jameson told the undercover agent that he wanted to commit an attack that was "something along the lines of NY or San Bernardino", the documents say. A note he evidently intended for publication after the attack swore allegiance to ISIS and cited President Donald Trump's recognition of Jerusalem as the capital of Israel as a reason for his actions. He soon told an undercover agent that "I also don't think I can do this after all".
Jameson has 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, the criminal complaint says.
Mr Jameson attended basic recruitment training for the US Marine Corps in 2009, but was reportedly discharged for not disclosing details of his asthma.
When the undercover agent replied, "We can only do Allah's will", James reportedly replied, "Inshallah (God willing) one day I can".
"We need something along the lines of NY or San Bernardino", he allegedly told the Federal Bureau of Investigation, referring to high-impact acts of terror in the cities. Both You and he are wrong, it belongs to the Muslemeen. "I've reconsidered", Jameson said, according to the criminal complaint. We have penetrated and infiltrated your disgusting country. It was signed by Abdallah Abu Everitt Ibn Gordon Al-Amriki and was dated December 16. I am not. Long live Isil, Long Live Abu Bakr al-Baghdadi.
Sarah Jameson said that the family had been OK with her nephew converting to Islam, although they had joked with him about "blowing things up".