The forest service is adding a reward to get more information on who vandalized Hidden Forest Cave last month. In late April, vandals heavily damaged the Cave with spray paint and fire. Jean Nelson Dean with the Deschutes National Forest says a local group came up with an idea to help catch the vandals: “We are looking for the public's help, if anyone has info the Oregon High Desert Grotto, a local caving group raised funds for a reward, so people should call Crimestoppers, 1-877-876-TIPS. The investigation is ongoing. People can remain anonymous and may get a cash reward.