Matthew Taylor Coleman.Photo: Instagram

Months after he was arrested for allegedlykilling his two childrenwith a spearfishing gun in Mexico,Matthew Taylor Colemanremains behind bars without bond as he awaits trial — and now the FBI is looking into his browser history and messages, PEOPLE has learned.
“By that date, the United States also will provide additional discovery consisting generally of cell site data, Mexican law enforcement reports, photographs and recordings of or from the area of the murders, jail recordings, and videos from the Port of Entry,” the motion continues.
A federal law enforcement source confirms to PEOPLE that FBI agents are focusing on his web browsing history, text and email messages, and postings on message boards and groups that discuss QAnon conspiracy theories.
“Agents are seeing what he read,” says the law enforcement source, “but we’re more interested in what he wrote about his beliefs and whether they had any influence over his actions in August.”

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A lifelong friend of Colemans previously told PEOPLE that Colemanspent an increasing amount of timeonline looking at conspiracy theory websites and message boards.
“It was obvious that he was spending a lot of brainpower on it,” the friend, who has known Coleman since they were children, told PEOPLE last month. “He was constantly checking those sites on his phone. He spent hours each day just glued to his phone looking at that stuff.”
Police say Coleman drove the children into Mexico. Two days later, authorities allege, he took the kids to a ranch, where hekilled them with a spearfishing gunand returned to his hotel a few hours later. He was arrested when he attempted to cross the border back into the United States.
Kaleo and Roxy Coleman.Matthew Taylor Coleman/instagram

“M. Coleman stated that he believed his children were going to grow into monsters so he had to kill them,” Bannon wrote.
Coleman wasindicted on murder chargesin September. If convicted, he is eligible for the death penalty. Coleman is now being held in protective custody. He has not yet entered a plea, and the public defender’s office has not returned PEOPLE’s calls for comment.
source: people.com