wasn't trying to hurt anyone. he claimed he was just trying to get overtime pay by creating a maintenance problem. but the fbi clearly did not buy it. they searched his phone and say they discovered isis videos depicting graphic murders. and they say an american airlines employee told them alani's brother was in isis and the mechanic had visited him in iraq. >> even the accusation that somebody that the flying public trusts, they put their family on airplanes, the accusation he may have done something to put the airplane in jeopardy, breaks that bond of trust with the flying public. >> reporter: authorities say alani had also received an article about airplane crashes involving the very sensor he had sought to disable. and he allegedly shared a message asking allah to take action against the kafirs, or non-believers. >> so, let's get right to pierre thomas, live in washington. and pierre, this man had worked in the airline industry for decades, but tonight, he could soon be facing terrorism charges? >> reporter: david, his attorneys emphasize that alani