(ST. CLAIR COUNTY) -- Michigan State Police Troopers are investigating the case of a missing 15-year-old girl from St. Clair County's Riley Township. Isha Greir was last seen by family members the morning of February 26 in Capac. Isha attends the Crossroads Alternative Education School in Capac and previously attended school in Mt. Clemens. Investigators believe the girl met with a subject and traveled to Roseville before returning to Capac on February 27 where she was last seen by a witness around 10 a.m. The Michigan State Police say information shows Isha may have been kidnapped and all leads are being investigated. Anyone with information on this case is asked to contact the State Police Post in Lapeer.