Glenn and his older sister moved with their mother to Sumner, Washington, attending a Jesuit school in Puyallup. On May 15, 1979, while out on a small boat with a male companion, Beck's mother drowned just west of Tacoma, Washington, in Puget Sound. The man who had taken her out in the boat also drowned. A Tacoma police report stated that Mary Beck "appeared to be a classic drowning victim", but a Coast Guard investigator speculated that she could have intentionally jumped overboard. Beck has described his mother's death as a suicide in interviews during television and radio broadcasts.