Did you catch them in the act Q Team, Space Force:

They never stop poisoning. Example Just today the put twigs from a similar tree in our back yard to make it look like they fell from our tree, but we have seen this before and always use gloves. We can tell they are not ours because most had straight cuts as if cut from an electric saw and we would have heard that at night when they dumped them. Even with gloves you can feel the cyanide just from the leaves touching you as you cut them.