Teree Becker was 20 when she was last seen hitchhiking to the Adams County Jail in Brighton on December 4, 1975 to visit her boyfriend. Her movements after leaving the jail are unknown. On the morning of December 6 a couple on motorcycles found her body, clothing, and personal effects in a field near 100th Avenue and Lowell Boulevard in Westminster, Colorado. An autopsy found she had been sexually assaulted and died of asphyxiation.

The case went cold for decades until 2003, when a male DNA profile was developed from evidence and entered into CODIS. In 2013 that profile matched a DNA profile submitted by Las Vegas Metro related to a 1991 cold case, linking the same man to both murders. Investigators began using genetic genealogy in 2018 and identified a suspect, Thomas Martin Elliott; records indicate he had an extensive criminal history and died by suicide in October 1991.

If anyone knew Teree, saw her in early December 1975, or has information about her movements after she left the jail, please come forward.