(Bardstown, KY)--The Kentucky State Police have released a video asking for tips in the murder of Officer Jason Ellis. Ellis was ambushed on the Bluegrass Parkway in May. He stopped to move branches out of the roadway and was attacked.  If you can help, you can calll the KSP Elizabethtown Post at (270) 766-5078 or call the toll free KSP Tip Line at (800) 222-5555. Or email them at EllisCaseETips@ky.gov