Dr. Zdenka Kalendovsky was a 40-year-old neurologist who was shot and killed at her clinic in Denver on the morning of February 7, 1977. A native of Czechoslovakia who had emigrated to the United States, she lived in Boulder with her husband and young daughter and worked as an assistant clinical professor at the University of Colorado Medical Center while also staffing a clinic at 701 E. Colfax Ave., Denver. Her research focused on strokes in young people and migraine headaches.

An unknown assailant entered the clinic and shot Dr. Kalendovsky; the Denver Police Department investigated but no suspects were publicly identified and no arrests were made. The case is listed with the Denver Police Cold Case Unit and remains unsolved.

Did anyone have contact with Dr. Kalendovsky at the clinic or know of tensions in her work or personal life that could help explain who had motive or opportunity?