First of all, you have to invent an argument with your next door neighbour. It could be for trying it on with his wife or a dispute about a tree in his garden blocking out the sunlight in yours.
Once this argument has gone on for some time and all of the other people in your street are aware of it, you break into his house and steal his shotgun.
You then attach several strong elastic bands which you have pre-soaked in a slow acting corrosive to a tent peg and push the peg into his back garden. you then tie the other end of the elastic bands to the shotgun and climb over the fence into your own garden. Pull the shotgun until the elastic is at full stretch then shoot yourself at point blank range in the face. As your corpse falls to the ground, you let go off the shotgun which flies back on the end of the elastic into your neighbours garden. By the time anyone comes looking, the corrosive will have melted the elastic and it will look like your neighbour has shot you in the face then dropped the gun.
That will teach the cunt to grow that fucking tree.