To be fair, in theory, just in dying moments he could have felt true sorrow for his actions. [I wouldn’t bet the farm on it though. I hope the minister said something like, “let us pray that what’s-his-face-was-really-sorry-for-being-a-terrorist-schmuck.”
Doesn’t matter if he felt bad about it. If he didn’t believe Jesus was the savior, and he worshipped the false god Allah , he isn’t in heaven and no amount of prayer will help.