The reason he wore gloves was that Ji Yun didn't want to leave any fingerprints.
As for the additional footprint, Ji Yun thought that even after the city had recovered from the disaster, trying to figure out exactly how this gang of thugs had been wiped out would be an incredibly fantastical task.
If nothing unexpected occurred, Ji Yun, who had a very good relationship with the Lan City Police Station, might even be invited to do a profile of the crime scene.
"Right, I knew it was these thugs fighting among themselves, all ending up dead!" a smug officer would surely say.
"Exactly, I also think they killed each other. After all, if there was only one gun, then there would be an absolute fugitive leader, but with two guns, the fugitives would disagree and eventually fight it out, closing the case!" Ji Yun would say at that time.
Anyway, Ji Yun had already predicted the future scenario.
As for dragging a body to make it look like a real fight had happened, there was no need.