Yavapai Silent Witness has increased the reward in the Grant Griffiths murder case to $75-hundred. The 58-year-old Griffiths was found dead in his Coyote Springs home, in Spur Lane, back on May 28th. Yavapai County Sheriff’s investigators say the murder may have taken place sometime the night before. Officials say there is no evidence to suggest there is any further damage to the public. If anyone has information into the case, call Yavapai Silent Witness 1-800-932-3232, or leave a tip at yavapaisw.com. A person that gives information leading to an arrest is eligible for the reward.