PLT DESCENDED BELOW MDA DURING A NIGHT VOR (NON-PRECISION) APCH TO AN UNCONTROLLED ARPT AND COLLIDED WITH TREES & GROUND WHICH WERE OBSCURED BY FOG. THE PLT HAD 'PUSHED' HIMSELF TO MAKE THE TRIP ACCORDING TO FRIENDS AND ASSOCIATES IN AN ATTEMPT TO WIN AN ELECTION RESULT APPEAL. HIS LAWYERS REPORTEDLY ARGUED THAT THE TRIP ON THE ACCIDENT NIGHT WAS NOT URGENT & THE MISSION COULD BE ACCOMPLISHED BY OTHER MEANS. THE PLT INSISTED ON GOING TO DO THE JOB HIMSELF IN SPITE OF THE KNOWN ADVERSE WX. THE PHYSICAL STRAIN & FATIGUE WERE APPARENT ACCORDING TO FRIENDS WHO HAD 'GIVEN UP', THEY SAID, IN TRYING TO STOP HIM FROM OVER EXERTION & LENGTHY WORK DAYS. THE TOXICOLOGY REPORTS SHOWED EVIDENCE OF A DRUG NAMED METHAMPHETAMINE COMMONLY CALLED 'SPEED'. HIS WIFE DENIED ANY KNOWLEDGE OF THE DRUG & HIS DOCTOR DENIED PRESCRIBING IT. IT IS NOT LEGALLY OBTAINABLE WITHOUT PRESCRIPTION AND IS AN APPETITE SUPPRESSANT. PLT'S WIFE SAID HE HAD LOST 'ABOUT 20 LBS' IN RECENT MONTHS. HE HAD NOT REPORTEDLY SEEN A DR RECENTLY. NO MECH DISCREPANCIES OF A CAUSAL NATURE WERE FOUND.