And why do you think it's done in their presence? The answer is simple: to give them another opportunity to see the goodness of God and open their hearts to embrace salvation and love. 

We may pray for the destruction, the termination, the thwarting, the nullification and the annihilation of the schemes, strategies, plans and works of our enemies but not for the death of the individuals themselves. Whether a man dies or lives is outside our jurisdiction. That must be left for God to deal with. He is the ultimate Judge. That's His call not ours.
 

~Brother Karo Kanye Akamune