I wanted to express my disdain for certaing people and say something along the lines of "If they by any chance were to die tomorrow, I wouldn't care" (I know it's a wrong thing to say, and I'm sorry.) What I actually said was:
They could have been killed tomorrow; I couldn't care less.
Shouldn't I have said: They could be killed...? I used the perfect infinitive to emphasize the improbability of them being killed any time soon. Now I feel I overdid it.