Theresa Insana was 26 and living in Las Vegas when she disappeared after a routine day that included voting and a phone call with her mother on October 26, 2004. She failed to report to work for two days; coworkers and her recent ex-fiancé, Jeff Fenton, entered her home through an unlocked sliding glass door and found Theresa gone but her purse, keys, cell phone, car, and dog Frankie left behind. Small drops of blood in a bathroom did not belong to her.

On November 1, 2004 construction workers found a body wrapped in blankets and towels in a culvert about 3.5 miles from her home; it was Theresa. An autopsy found she had been sexually assaulted, severely beaten, and killed by ligature strangulation and blunt force trauma. Investigators believe a violent struggle occurred in her home, that her car was used to move the body to the drainage ditch, and that the scene was then partially cleaned. Her ex-fiancé had a confirmed alibi and his DNA did not match the male DNA recovered from the scene.

The case remained unsolved for years. In 2017 the Las Vegas Metropolitan Police Department used DNA phenotyping on the unknown male DNA and released a composite sketch suggesting a male of Southeast Asian or Filipino descent with dark hair and dark eyes. No identity has been confirmed. Did anyone who knew Theresa or who lived near her in 2004 notice suspicious activity or a vehicle that night?