DC8 CAPT BECOMES INCAPACITATED AFTER LNDG AT IND.

Narrative

ON LNDG ROLLOUT AT IND ON RWY 32; THE CAPT TOOK CTL OF THE ACFT AT APPROX 80 KTS. HE STOWED THE REVERSERS AND I HEARD HIM SAY SOMETHING TO THE EFFECT OF 'MINE;' OR 'MY ACFT.' THE TWR TOLD US TO TURN L AT THE END AND CONTACT GND. THE ACFT HAD SLOWED TO A FAST TAXI SPD WITH ABOUT 1000 FT LEFT TO THE TURNOFF. I PROCEEDED TO MONITOR THE HYDS AND BRAKE PRESSURE. WE HAD STARTED TO TURN L OFF THE RWY CTRLINE. I WAS MONITORING THE PRESSURES AND FELT THE ACFT YAW BACK TO THE R. I GLANCED FORWARD AND NOTICED THAT WE WERE STRAIGHTENING OUT AND HDG INTO THE RWY STOPWAY. I YELLED 'CAPT;' OR SOMETHING OF THE EFFECT. WE THEN PROCEEDED OFF THE STOPWAY AND INTO THE CLEARWAY MUD. THE ACFT STOPPED. THE CAPT HAD A VERY DAZED LOOK AND WAS LEANING/HUNCHED OVER TO THE STEERING TILLER SIDE OF THE ACFT. HE WAS SWEATING AND ACTING IN SLOW MOTION. HE THEN PULLED THE REVERSERS. AT THAT TIME I KNEW SOMETHING WAS VERY WRONG. I STOWED THE REVERSERS. THE FO CONTACTED TWR AND TOLD THEM WE WENT OFF THE END. I ATTEMPTED TO TALK TO THE CAPT BUT HE WAS UNRESPONSIVE. I ASSUMED HE HAD A STROKE OR SOME TYPE OF A SEIZURE. I TOLD THE FO TO CONTACT TWR AND LET THEM KNOW WE NEEDED AN AMBULANCE. WE WAITED FOR CFR AND BEGAN SECURING THE ACFT AND CONTACTING THE COMPANY. AT NO TIME OR POINT IN THE LNDG ROLLOUT WAS ANY DIFFICULTY; MEDICAL PROB; PHYSICAL SIGNS OR IRREGULARITY NOTED. THERE WERE NO SIGNS OF DISTRESS; PAIN; DISCOMFORT; OR NOISE; IE; SCREAMING IN PAIN. EVERYTHING HAPPENED IN THE SPLIT SECOND OF TURNING OFF THE RWY VERSUS GOING OFF THE END. THE FO AND MY REACTIONS WERE INSTANTANEOUS BUT THAT WAS NOT FAST ENOUGH. WE HAVE BEEN INFORMED THAT THERE WAS NO DAMAGE TO THE ACFT; IT HAD BEEN RELEASED BY THE NTSB AND THE FAA. IT ALSO HAS BEEN RECOVERED FROM THE SCENE AND RETURNED TO REVENUE SVC. THE UNFORTUNATE BY-PRODUCT IS THAT OUR CAPT WILL NEVER BE RETURNED TO SVC.