First i saw it at the hippy camp, a pair of shoes hanging on a big dead tree.
It didnt get my attention since it got a low res model/ texture. So i discard it as a decoration stuff made by rockstar
then i saw this one at merle abraham burned house
it started to caught my attention at this point since there are 2 pair of hanging shoes each at 2 important places.
So i try roaming around the map in searching for another hanging shoes then found another 5
actually i'm thinking that this shoes are related to the infinity killer. So maybe there are 8 pair of hanging shoes since there are 8 victims.
Already found 7 by now.
btw this theory is dead if someone find more than 8 pair of hanging shoes though.
Kifflom brother brother!