john goodwin , 75 , of atkinson , new hampshire , went on trial this week on six counts of aggravated felonious sexual assault .
the jury were not aware of what had happened when they decided they could not reach a verdict .
goodwin had pleaded not guilty in the case in which prosecutors said he repeatedly sexually assaulted a student , who is now 24 .
the former student alleged the abuse began when he was 11 years old and lasted from 2002 to 2005 .