For the quest "Breaching Security", you're to kill Gaius Maro (preferably in a town) and then place a letter on his body.
I followed him to Solitude and transformed into a werewolf to kill him, to avoid the bounty. I then ran outside to transform back, planning to return inside Solitude then.
When I got back in however, the marker for his body seems to be underground, near where I killed him. It's not a door marker. Is this a glitch where his body has disappeared, or has his body been moved somewhere (like the Hall of the Dead)?