The OSBI is offering up to a $5,000 reward for information leading to an arrest and conviction in the case of a Bristow man found murdered in his house on January 27, 1991. 24-year-old Michael Gabriel was shot to death. He lived at 207 East Washington in Bristow. The OSBI interviewed several people and collected evidence at the scene, but the case has never been solved. "We hope offering a sizeable reward will encourage someone with information to come forward," said spokeswoman Jessica Brown. "Time could also be a positive factor in this situation. In other cases where a crime has gone unsolved for decades, we have seen relationships change, empowering a witness to come forward." Anyone with information should call the OSBI at 1-800-522-8017.