Katherine Schultz was 18 when she vanished from Minnesota on September 20, 1974 and was found the next day in a cornfield, beaten to death with a hammer. Reports describe catastrophic head injuries; her skull imploded from the blows. Born and raised in Minneapolis, she had been balancing school and work before she disappeared.

Her killing came during a short, frenzied stretch of violence in the Twin Cities that September. In the days before her death a young woman abducted from a Sears parking lot survived a brutal assault, and two teenage girls escaped an attack at a gas station. The pattern of attacks, the use of a hammer, and the compressed timeline led investigators to focus on a single offender. Police arrested 47-year-old Harvey Louis Carignan on September 24, 1974. Carignan later pleaded guilty to second-degree murder in Schultz’s death and received a 40-year sentence; he was also convicted of first-degree murder for the death of Eileen Hunley and given life in prison. His admissions and convictions closed the question of who killed Schultz; there were no additional suspects.

Did anyone in Minneapolis in 1974 have memories or information about Schultz, the attacks that September, or unusual activity around the Sears parking lot or local gas stations?