Guillermina Rosas Coleman, 72, disappeared from Medicine Hat, Alberta after last confirmed contact the evening of July 4, 2004. She was a resident of the Cypress View Foundation and was noted missing by the morning of July 5, having left her residence sometime during the night or early morning. Guillermina was described as 5 feet tall and about 100 pounds.

The Medicine Hat Police Service led the initial response and searched the area around the Cypress View Foundation, and investigators asked the public for any information about her whereabouts. No clear indication of where she went emerged, and the case remained open as her family continued to hope for answers.

If anyone had contact with Guillermina around July 4–5, 2004, or saw her in Medicine Hat that night or the following morning, please come forward with information.