A teenager who was convicted of sexually assaulting girls at two different Virginia high schools and apparently assaulted a third will not have to register as a sex offender, a judge ruled Thursday. The 15 year old, whose name has not been made public, was ordered by Loudoun County Juvenile Court Judge Pamela Brooks in mid-January to register for the registry, which helps members of the public learn where convicted sex offenders reside. Just two weeks later, Brooks reversed her decision, local news outlets reported. The judge said she mistakenly accepted an oral motion from prosecutors asking for the registration and that the prosecutor’s office had not submitted a written motion, WJLA-TV reported. Brooks said in her judgment that juvenile court is aimed at rehabilitating criminals and noted a recent report entered by defense lawyers that says nearly all 12- to 17-year-old sex offenders who receive treatment do not commit additional …