A Colorado man on the U.S. Marshals Service's 15 Most Wanted fugitive list has been arrested in Detroit.Richard Carl Heeringa of Douglas County, Colo., is a convicted child molester, the marshals said."Heeringa is a predator who has a track record of preying on young girls," said Geoff Shank, acting assistant director of the U.S. Marshals Service Investigative Operations Division.A jury found Heeringa guilty of 17 counts of sexual assault on a child by a person in a position of trust and failure to register as a sex offender in 2010. The day the jury reached its verdict, Heeringa fled in the middle of the night, the Marshals Service said. He had not been located since. He was facing more than 500 years in prison.Heeringa, 55, has two other sex assault cases pending in Colorado and previously served 12 years in prison in Michigan following a sex assault conviction there. Denver U.S. marshals fugitive task force supervisor Charles Ahmad says Heeringa had been living under the assumed name Tim Thurman and was working in construction.See the U.S. Marshals 15 Most Wanted list.