Are you serious?You took his traps when you got yours back?Heres a thought that may not have occured to you.When he took your traps he was in possesion of stolen property, now you have yours back and your the one in possesion of stolen property.Realisticly if he wanted to he could have you arrested right now and odds are good nobody would believe you when you try to convince them he started it because he has no stolen traps in his possesion now.

In the future do one of two things, take your stuff and let it end there, or report the theft to the game warden.If you take his stuff just because he took yours youre not much better than he is IMHO and you pretty much screwed any chance you had of getting the law on your side if he chooses to escalate the problem.