A teenager with a guilty conscience has complicated a New York congressman’s claim that there was a politically motivated break-in at his campaign office. The eighth-grader confessed to a guidance counselor at his school on Tuesday that he and a friend were the ones who smashed windows over the weekend at the Staten Island campaign office of Republican U.S. Rep. Michael Grimm, said New York Police Department spokesman Paul Browne. Police called it a random act of vandalism. They said the teen only became aware his target was Grimm’s office after a wave of news reports about a possible break-in. The boy was expected to be charged with criminal mischief as a juvenile, Browne said.