Jared Bowser was brushing his teeth, about to leave for a concert, when he heard a knock at the front door. The 19-year-old still lived with his parents. His mother, the only other person home, answered the door and walked back to the bathroom. “Her voice was the crying, shaky kind,” Bowser said. “She asked me ‘Jared, why is the FBI at the door?’” Two agents dressed in black suits with leather bound portfolios sat at the kitchen table and asked about five songs by musician Ryan Adams they said Bowser shared on the internet. The songs had not yet been released, but Bowser had copies thanks to a friend…