Crash of a Cessna 550 Citation II in Roxboro: 2 killed

During arrival, flight was vectored for NDB runway 06 approach, and advised Raleigh-Durham weather was 500 feet overcast, visibility 3 miles with fog, wind from 140° at 12 knots, altimeter 30.01. After clearance for approach, aircraft crossed final approach fix (faf) at 2,100 feet msl. Radar service was terminated and frequency change was approved. When aircraft did not arrive, search was initiated. The wreckage was found about 2.5 miles southwest of runway 06, where aircraft hit trees and crashed. Elevation of crash site was about 600 feet msl. MDA for approach was 1,160 feet msl (with local altimeter setting; 1,260 feet with Raleigh-Durham setting). Exam revealed aircraft hit trees, while on runway heading in wings level attitude; configured for landing. No preimpact part failure/malfunction was found. Toxicological check of pic's blood showed 0.10 mg/l of diazepam and 0.09 mg/l of nordiazepam. Check of his urine showed metabolite of marijuana (11- nor-delta-9-tetrahydrocannabinol-9-carboxylic acid) at level of 0.117 mg/l. After surgery for malignant lymphoma (feb 89), pic was restored to flight status on 8/9/89 and cleared for pic duty one week later. He continued flying tho he received maintenance chemotherapy and associates noted that he tired easily. Both occupants were killed.