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FORT WAYNE, Ind. (June 30, 2014)—Cold case investigators with Indiana State Police are asking for the public’s help in trying to solve a nearly 40-year-old murder case in Noble County, Ind.

Police are searching for members of a singing group that performed at the Cokesbury Inn inside Epworth Forrest on the evening of Aug. 6, 1975. According to detectives, 17-year-old Laurel Jean Mitchell was last seen leaving work at Epworth Forrest around 10:15 p.m. that night. She was found dead the following day in the Elkhart River.

The group, which was comprised of four or five male and females between the ages of 16-22, is believed to be from Delphi, Ind. Police said they traveled in one vehicle and detectives believe the group stopped at the North Webster fire station around 10:30 that evening.

Detectives said an award is being offered for any information that leads to the solving of this case. Anyone with information about the group members’ identities or information about the Mitchell case is urged to contact Det. Kevin Smith at 260-403-2841 or 260-432-8661.