(NECN: Brad Puffer, Woburn, Mass.) - Tragedy strikes the family of Olympian Nancy Kerrigan. Police say the figure skater's father was found dead Saturday night at his Stoneham, Massachusetts, home. This morning, Kerrigan's brother was arraigned for assaulting him. 45-year-old Mark Kerrigan has been charged with assaulting their 70-year-old father, Daniel Kerrigan. Click here to hear more from the Stoneham police chief. A police report says Mark Kerrigan was found in the basement of the Stoneham home and was "belligerant and combative" when questioned. Officers used pepper spray to subdue him and eventually arrested him.