How did Leroi Moore die?

Answer 1

Roi suffered 4 broken vertebrae, 8 broken ribs and a broken clavicle in the accident. He required surgery to repair the clavicle. He also required mechanical ventilation to decrease the effort required for breathing and ensure adequate breathing did occur. Unfortunately he still developed pneumonia.

After being released he was admitted again for pneumonia (?) and once again was placed in the intensive care unit.

After the second hospital visit he went to Los Angeles for physical rehabilitation.

There is speculation that he may have developed deep venous thrombosis (blood clotting in the veins in the lower legs) from decreased mobility for a couple of months. Subsequently this resulted in pulmonary embolism once increased activity from rehab began, and the clot was released from the legs, lodging in the pulmonary artery and blocking oxygen flow into the blood from the lungs.