Doreen was last seen at her family's residence sometime between 8:00 and 9:00 p.m. on June 5, 1988 on Whirlwind Hill Road in Wallingford, Connecticut. Her father said they had an argument and she took some money and extra clothing and left. She never returned home and has not been seen again. Doreen moved in with her father and stepmother, Mark and Sharon Vincent, ten days before her disappearance. Mark was known for his violent temper and his account of the day Doreen went missing was inconsistent. He admitted he pushed her into a window, breaking it. About a year after Doreen's disappearance, law enforcement did a search and found some items Mark claimed she'd taken with her when she left. Doreen has a small mole on her abdomen.