TULSA, Okla. (AP) — The question of who raped and strangled a college student inside her Tulsa apartment has haunted investigators and her loved ones since the brutal slaying in 2004. DNA tests proved fruitless. Tips from the public yielded nothing.

Inspired by the unorthodox approach to capture a notorious serial killer in California, a Tulsa cold case detective hopes a genealogy website will help solve the killing of 18-year-old Brittany Phillips.

The largest hurdle Eddie Majors has faced since taking on the case about four years ago is the lack of people willing to give information that he'...