Squigly Squigly's Brain Teasers

Question:

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?

Answer:

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."