Unless you can provide us with a description of the vehicle (license plate, vehicle, etc.) or if you can tell us where the illegal material came from, such as a neighbor, then, unfortunately, you still become responsible for the contents that are found in your brown recycling container. One key to minimize this from happening is to remove your containers from the alley after they have been emptied. We do find that many residents keep their containers in the alley all the time - leaving them susceptible for others to use and abuse.