Is it possible to check which player with GM status put a token down?

Hi, I recently took up GM status in a friend's game to help him make a map. One day, he asks me 'what is this', and pulls me to one page in particular where there's three different pictures of an old man holding up a lighter. These images are hidden beneath the floorboard. I know for certain I didn't put it there as I never modified the map, and he insists that he didn't put it there. Is there any way to check if someone created a specific token? Thanks. EDIT: Picture in question. Pulled this to the token layer. <a href="http://i.imgur.com/jrDWU8K.png" rel="nofollow">http://i.imgur.com/jrDWU8K.png</a>

A player can also drop Character that they control, from the Journals tab onto the tabletop (would certainly land on Token Layer). A player can also upload just the one picture, portrait on the Character, and if they don't have a Default Token then it is this portrait that drops onto the tabletop. Could the pic of the lighter-man be from a Player's Character portrait?