I'm in the middle of the side quest, "Identity Theft". I found the first two bodies and did the scanning on both of them. I went to the area that the third body is suppose to be at and it's not. I've left and come back several different times to see if it will appear, but it never does. I've tripled checked to see if I missed anything at the second crime scene and I haven't. I want to know if I may have missed something after I found the second body. You don't need to talk to someone after you find the second body, similar to the first one? Maybe it's a glitch?

I haven't finished that one, either. Not sure which scene it was but I found a victim and followed the blood trail to a guy with bloody hands. After that, nothing. I've done a great job finishing all of the side quests without consulting a guide but that one has me stumped!!

i was stuck in the same section, my problem was i was at the spot where the 4th body was supposed to be found

or maybe you try restarting the game, that helped when i actually found the 4th body and it didn't trigger a response.

You just have to keep patrolling Gotham until you stumble across the location of a body (I cheated and used youtube on the last two). No clues to follow or anything. Just dumb luck.

or he could use this map

Thanks for the map. I done 1-5, but when I go to where 6 and 7 are I can't find the body there. I'll check again later to see if it appears, but if it doesn't I'll just do a different mission.