(Brentwood, N.H.) - A Dover man was sentenced to 10 and a half to 22 years in prison for manslaughter today  as a result of an assault at the former Page Restaurant in Portsmouth which caused the death of 24 year old Joshua Krantz, also of Dover. Zachary O'Neil was sentenced in Rockingham County Superior Court. He apologized to the Krantz family but said he was "not going to insult anyone by asking for their forgivness"