CHARLOTTE, NC (WBTV) - A Charlotte man is behind bars after investigators say he threatened to kill President Obama during the Democratic National Convention. Investigators told WBTV that Donte Jarmar Sims, 21, was arrested on Wednesday, charged in a felony criminal complaint accusing him of threatening the president's life. The first tweet was sent out at 10:06 a.m. on Monday when Sims tweeted, "Well Ima Assassinate president Obama this evening !... Gotta get this monkey off my chest while he's in town." "Ima hit president Obama with that Lee Harvey Oswald swagg," he tweeted just two minutes later.