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SALT LAKE CITY-- A Utah sheriff who trailed a suspect across country for four days to grab a DNA sample from a cigarette butt says it solved the murder 18 years ago of a teenage prostitute.

Wasatch County Sheriff Todd Bonner was the original investigator in the bludgeoning death of Krystal Lynn Beslanowitch along the Provo River near Midway in 1995, and he kept at it over the years.

A Utah lab, Sorenson Forensics, recently vacuumed the suspect's full DNA from a rock used to crush the girl's skull. It matched a sample that Utah authorities already had from Joseph Michael Simpson.

But the sheriff had to obtain a fresh DNA sample.

He got it from a cigarette Simpson discarded at a smoke shop in Sarasota, Fla., and the arrest was made.

Bonner says the case has haunted him for years and he was finally able to solve it with advances in DNA technology.