The brother of former Olympic skater Nancy Kerrigan has been charged with assault following her father's sudden death over the weekend in Stoneham. Mark Kerrigan, 45, pleaded not guilty during his arraignment in Woburn District Court Monday where he was charged with assault and battery on a person over 60. Police reports said officers received a 911 call to the Kerrigan home at 7 Cedar Ave. about 1:30 a.m. Sunday and found Kerrigan's father, Daniel, unconscious and not breathing on the kitchen floor. Mark Kerrigan, an unemployed plumber and Army veteran, was found in the basement, where he had been living in his parent's home since being released from a Billerica jail where he served time on 2007 assault and battery charges. Click on the pic for the full story.