US | graffiti Man Allegedly Graffitied Over Prehistoric Rock Carving He reportedly claims he was drunk and wanted revenge on his boss By Newser Editors and Wire Services Posted Oct 23, 2015 5:40 PM CDT Copied Sequoia National Forest (AP Photo/Jeff Cordes, Wildlife Biologist, Hume Lake Ranger District, Sequoia National Forest) Authorities say a man recently sprayed graffiti on a prehistoric rock carving of a bighorn sheep in California's Sequoia National Forest. Prosecutors say 58-year-old Christopher Harp sprayed a black substance on several large rocks, including one depicting a bighorn sheep. Special Agent Brian Adams with the US Forest Service says Harp admitted to the graffiti. He says Harp claimed he was getting revenge on his boss for talking down to him. Harp told the agent he was drunk and didn't know the rocks had historical value. He has pleaded not guilty to charges he damaged the rock. Court records show Harp has been placed in treatment. Read These Next A former NFL Pro Bowler has died at age 36. The massive AWS failure exposed a big problem with the internet. Backlash for Trump nominee who said he has 'a Nazi streak.' Marco Rubio struck a controversial deal with El Salvador. Report an error