Can we dissect this a minute?
Why would WH dump evidence in areas so easy to tie back to him? Is he really that stupid? (probably) I can sort of see a train of thought where if he dumps things around his normal route, he wouldn't be tracked as out of his normal routine.
However! Not only is evidence showing up where it is easily tied to his normal routine, much of it was found by him. What seasoned criminal does that?! I don't for a fraction of a second believe that he has been clean since he got out of jail. So, he knows how not to get caught.
If evidence had been recovered without his direct involvement, I wouldn't be having such a hard time believing he's just stupid. But planting and then leading investigations back to it just is so beyond stupid, I can't even fathom.