My money is on the neighbor. Nothing is so infuriating as having someone mess with your attempt to build. Nothing.
I'm thinking the same thing. Plus there's the mob hit scenario involving the neighbor. It's like something out of the Sopranos.
It would take at least two people to get his body into a dumpster.
I agree. The neighbor did it. I had a rotten neighbor at my previous home. We were at war. He messed with what I built, getting the building inspector on my case. I got my revenge, the building inspector made him remove changes to his house while mine remained. Plus I did more to him, but I didn't kill him! He ended up apologizing but too late.
It would take at least two people to get his body into a dumpster.