The National Oceanic and Atmospheric Administration’s Office of Law Enforcement said a witness reported seeing a person decapitate the dead animal before leaving the area.

A $20,000 reward is being offered for information on a grisly discovery at Doran Regional Park in Bodega Bay on Christmas Day. NOAA’s Office of Law Enforcement is investigating after a man was reported to be seen cutting the head off of a California sea lion.

Someone cut off the head of a sea lion in Northern California and rode off with it in a bag. Authorities are now offering $20,000 for information that helps find the perpetrator.