Background
Wilson was born JoAnn Geiger in Osage, Iowa to Harlan and Betty Geiger.
Wilson was born JoAnn Geiger in Osage, Iowa to Harlan and Betty Geiger.
She met Colin while attending Iowa State University in 1960, and in 1962, the couple married and relocated to Moose Jaw, Saskatchewan. The Thatcher marriage began to sour in the late 1970s, culminating in physical abuse and finally a divorce. Two years after an unsuccessful attempt on her life, JoAnn was found beaten and shot to death in the garage of her Regina home.
After a lengthy police investigation, Thatcher was charged and convicted of the murder.