Hi :D

You don't have to kill specific people as far as those dots go. All you have to do is get to the block in question and kill any pedestrian within that block.

I find that it's best to start the mission by going up and a bit left to where that one dot sort of stands out on the map then work my way around the blocks going counter-clockwise.

Glad I could've helped. Now, go out there and cause some havoc in Theftropolis :D