Defense attorney Kevin O’Brien, representing 20-year-old Cyrus Tetreault, says the night Tetreault hit 53-year-old Brian Miller with a pipe wrench it was in self defense. WRGB reports Tetreault faces charges of manslaughter in the 1st degree, and criminal possession of a weapon. O’Brien says on Friday May 31st, Miller was coming at Tetreault and his girlfriend with a hatchet while Miller’s friend had a knife.