Prep school grad gets jail in assaultCONCORD, N.H. — In a case that scandalized an institution known for educating some of America’s top political and literary leaders, a graduate of an elite prep school was sentenced to a year in jail for sexually assaulting a 15-year-old girl as part of a sexual conquest competition.Owen Labrie, 20, of Tunbridge, Vt., on Thursday also was ordered to register as a sex offender for life in connection with the May 2014 assault at St. Paul’s School in Concord and to serve five years of probation after he gets out of jail. He can petition to be removed from the sex offender list 15 years after he completes his sentence.Labrie’s arrest exposed a tradition at the $55,290-a-year boarding school called Senior Salute, in which upperclassmen kept score of how many younger students they had sex with.