LIVINGSTON COUNTY (WWJ) – Twenty-one years after she went missing, police say they have some promising new leads to help them solve the 1990 disappearance of Paige Renkoski.

It was May of 1990 when Renkoski’s running car was found along the side of I-96 near Fowlerville, and she hasn’t been seen since.

Police have released three new composite sketches of different men from witnesses. One of the sketches depicting a serial killer now doing life that police would like to interview.

DNA technology may allow investigators to lift palm prints from the outside of Renkoski’s car. And with the help of tips — 65 in the past two years — cadaver dogs will be brought in to search several areas that could be the sites of makeshift graves.