Dorothy Smock, a 52-year-old Caucasian woman, was found dead inside Solar Engineering Systems in Yuma, Arizona, on the evening of September 29, 1979. The scene showed signs of a violent struggle; she had been bound with tape and her face was covered with tape, which caused her to suffocate. Investigators concluded robbery was unlikely: her purse had been emptied and her wallet was found outside the building, yet diamond rings and a gold watch were left behind.

The Yuma Police Department collected substantial fingerprint evidence and interviewed hundreds of people while pursuing many leads. A juvenile who escaped a local detention center shortly before the murder was later investigated and cleared after his fingerprints did not match those from the scene; he was subsequently convicted of an unrelated murder in California. No arrests have ever been made and the case remains unsolved.

Does anyone have memories or information about Solar Engineering Systems, people connected to Dorothy, or activity in Yuma around late September 1979 that could help reopen leads?