A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:
710 57735 34 5508 51 7718
Currently there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

Bill. If you read the message upside down, you'll notice that the numbers resemble letters and that those letters form legible sentences. The message is "Bill is boss. He sells oil."