(AP) — A former leader of a Northern Arizona University fraternity pleaded guilty Monday to hazing and causing a pledge’s death by making him drink excessively at an off-campus rush event. Martinez, who was pledging to the now-defunct Delta Tau Delta fraternity chapter at NAU, was found unresponsive Jan. 31. Coconino County Attorney Ammon Barker said the plea doesn't diminish the “profound harm caused or the sorrow of Colin's death.” Martinez was among four men pledging to Delta Tau Delta who shared two bottles of vodka to ensure they vomited, according to court documents. The university suspended the Delta Tau Delta fraternity after Martinez's death, and the national organization closed the NAU chapter.