bloody fingerprints. the first big question, did the killer assuming he was a man have a phone on him when he did the shooting. and, what tower near the murder scene had the phone pinged off? >> we had tons of and i'm not exaggerating, thousands upon thousands, upon thousands of phone calls that hit all these various towers. >> reporter: in that electronic haystack, a sharp-eyed cop noticed a call around the time they believed brandy was killed. it was made from a number with a 310 area code now normally that's southern california. the county lawmen traced that 310 number back to an anonymous disposable phone, a burner purchased in zanesville a week before brandy died. >> i get the call records for the 310 area phone, and start combing through those. he only called two people. a second burner phone and josh daniels. those were the only two. >> reporter: was this their breakthrough? that burner phone, at the right time, right place, had called josh's phone in alaska. then the phone techs did another