>> reporter: we've got new information about an isis fighter. he's a former colonel with the counterterror police. we have learned that this man was trusted enough to be allowed inside the united states for extensive counterterror training. donned in isis black, he confidently carries a long sniper rifle. he picks off a tomato to show his skill. this is an isis video, and cnn has just learned this man trained on american soil. the fighter says he's a former commander in a special police counterterror unit in a key u.s. ally. >> translator: from 2003 to 2008 i received specialized training in america on the military base of blackwater. >> reporter: blackwater a controversial u.s. contracting company which sent private security personnel to iraq and trained other countries' fighters at this compound in