Marie attended a 4-H dance at the Pavilion in Craig, Colorado on November 21, 1979. Afterwards she went to a party at the Shadow Mountain Village mobile home park with her friend, Marty Dean Doolin. Some of Marie's female friends were with them also, and became alarmed because people at the party were using drugs and most of the guests were male. Marie's girlfriends decided to leave as a result, but Marie elected to stay. Doolin later told investigators that Marie said she had a ride back to her hometown of Hayden, Colorado with an unidentified driver between 1:30 and 2:00 a.m. on November 21. Doolin stated that this was the last time he saw Marie.