KOB-TV, Associated Press, KUNM The National Park Service says it's investigating an incident in which a man was tased by a ranger at Petroglyph National Monument in New Mexico. Darrell House was stopped Sunday by the ranger for walking in a closed area off trail in violation of park regulations. Video taken by House shows the ranger asking for his identification. House declines, insisting he hadn't done anything wrong. The ranger told House he was refusing a lawful order and that he would have to be detained until he could be identified. Video posted by House on social media then shows the ranger tasing House while he screams for help and rolls on the ground. The ranger repeatedly asks for him to put his hands behind his back as House raises his hands and at times folds them in front of his chest while still calling for help.