The week-long ground search for a missing plane and pilot came to a conclusion on Wednesday. All high probability areas were searched, but no sign of a crash site was found. The search began on February 28th, when an RV-6 piloted by James Willess disappeared from radar over a remote section of the park. The intensive search involved park staff, Texas Highway Patrol officers, and Civil Air Patrol and Texas Department of Public Safety aircraft. Routine patrols will continue to search for signs of the downed plane, and specific areas will be checked as new intelligence is developed. The Civil Air Patrol will continue an aerial search.