Shirley Anne Lonethunder was 25 when she disappeared from Saskatoon, Saskatchewan on Christmas Eve, December 24, 1991. A mother of two and the oldest of five children from White Bear First Nations, she was last seen that afternoon after telling family she was going downtown to buy presents. At the time she was described as slender, between 5 feet 3 inches and 5 feet 5 inches, about 128–130 pounds, with long black hair, brown eyes, a four-centimetre scar on her left cheek and tattoos — a heart on her left ankle and a bird and heart on her right calf. She was wearing a black jacket, blue denim jeans and white running shoes.

Her family did not realize she was missing until March 1992, when her lawyer notified them after she failed to appear for a court date; a missing person report was filed then. That delayed reporting figure is cited by her brother Stacey Lonethunder as hampering the early investigation. The case remains open and is classified as an endangered missing person. Some have suggested a possible connection to convicted killer John Martin Crawford, active in the area at that time, but no definitive link has been established. Her family continues to seek answers and holds to traditional stories that keep hope alive.

If anyone knew Shirley, saw her downtown Saskatoon in late December 1991, or has information that could help, please share what is known.