UPDATED at 6:20p.m.:The manhunt is over for a suspect accused of kidnapping an ex-girlfriend at gunpoint Thursday at the Slippery Rock Campground in Worth Township.John Thomas O'Leary, 52, the alleged kidnapper, was involved in a multi-vehicle chase in Pittsburgh, according to state police.Police said O'Leary crashed his vehicle and as a result took his own life.--------------------------------------------A manhunt is on for a suspect accused of kidnapping an ex-girlfriend at gunpoint Thursday at the Slippery Rock Campground in Worth Township.State police said they consider the alleged kidnapper, John Thomas O'Leary, 52, of Munhall, Allegheny County, armed and dangerous.Police obtained a felony arrest warrant Thursday night for O'Leary in connection with a reported home invasion earlier that day at the campground on West Park Road.The 57-year-old victim allegedly told authorities that O'Leary, a former boyfriend, arrived at a camp trailer where she was visiting around 11 a.m. and entered the home uninvited.She accused him of grabbing and shoving her onto a bedroom mattress. He allegedly held a handgun to the side of her head and told her he was going to kill her, police said.The woman recounted that she tried to calm and console O'Leary. She said he eventually ordered her to get up and go for a walk with him.The two walked through the campground. O'Leary later said he had to use the bathroom, so he and the woman drove to the facility's common restroom area.The woman eventually managed to alert her brother, who was nearby, about her dilemma. The brother notified security, who called 911.Police allege that during the incident, the suspect also threatened the life of the woman's brother.O'Leary, who had started driving his car with the woman in it, eventually stopped long enough for her to get out and run off around 3:30 p.m. She apparently was not hurt.The defendant drove away.Police noted that the victim already had a protection from abuse order against O'Leary, who is a convicted felon. The PFA was issued in Westmoreland County.Investigators said that the victim was unable to get emergency assistance for about four hours.Police are seeking the public's help in finding O'Leary, who they believe is driving a silver, 2018 Hyundai Elantra. It was last seen with the Pennsylvania license plate JXS5280.Anyone with information is asked to call 911.