Pearson was last seen in Missoula, Montana on March 13, 1966. She has never been heard from again. After her disappearance, her car was found abandoned in the business district of Missoula. Pearson is originally from Portland, Oregon and was divorced at the time of her disappearance. She was attending graduate school at the University of Montana and worked as a lecturer of business administration. She disappeared right before she was supposed to turn in her doctoral thesis. Pearson left her home undisturbed and she never picked up her last two paychecks, totaling $1,200. Few details are available in her case, but foul play is suspected; authorities think she was killed in the Blue Montain area. Her disappearance remains unsolved.