What do you mean with "by giving the drugs to detain patients"? Is that a typo? I don't see how companies holding on to terminally-ill patients makes the trial

What do you mean with "by giving the drugs to detain patients"? Is that a typo? I don't see how companies holding on to terminally-ill patients makes the trial results look more favourable. Are you suggesting that companies might not release the bodies of the patients that died during the trial?