The Final Gift Quincy M.E. : Season 5 Episode 20

Two old Korean war buddies of Quincy's, Charlie and Max, have an accident in one of the planes owned by their company. Although the most badly injured of the two should have survived for some reason he dies in hospital. The police think that Charlie could have killed his partner because of another, bigger, company wanting to buy up theirs and Quincy sets out to prove that he would not have done such a thing to his best friend and partner.