Riddle: A detective who was mere days away from cracking an international oil smuggling ring has suddenly gone missing. While inspecting his last-known location, officers 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 is the suspect if you read upside down the numbers it says: "Bill is boss. He sells oil."