Trevin M. Sanders, 18, was charged with two counts of aggravated homicide for the murders of Robert and Colleen Grube. Mercer County Sheriff Jeff Grey made the announcement this morning at a press conference held at the Sheriff's Department in Celina. Sanders is currently in prison at Michigan City, Indiana, on an unrelated charge. During the 18 minute conference, Grey thanked those involved with the investigation, summarized the efforts involved in the investigation, and repeated information about Bryant L. Rhoades, 22, of Union City who was arrested and charged with obstruction of justice in conjunction with the case. Sheriff Grey said the turning point in the investigation came in January 2012 as a result of arrests made by the Jay County Indiana Sheriff's department.