(Portland, OR) -- The man who's charged with using a gun to takeover a TriMet bus in Portland on Wednesday is charged with kidnapping, robbery and felon in possession of a firearm. 44-year-old Hosea Chambers is accused of boarding the bus and threatening the driver. Chambers held a gun to the driver's head counting down several times threatening to kill him. He eventually let the driver off the bus, but remained inside for hours until police put a chemical irritant into the bus and he was arrested.