take off your shirt the mexican mafia carries a side from their name, mexican mafia tattooed on their body, common tattoos are aztec symbols, you'll see the pyramids and the sun god looking up numbers correlate to letters of the alphabet. we'll see numbers like the number 13, and m is the 13th letter of the alphabet. take off your shirt. >> all right. >> the orejones are less complex. >> that way. for them, san antonio is their city. so anything san antonio-related will be on their body. other common things are area code. 210. >> 210, what's up? >> spur symbols are common and the city skyline identifiable. known as orejones which means big areas, so we'll see tattoos of an actual ear somewhere on their body, or a playboy bunny, if you know how to read the tattoos you find out this guy's a member. >> gang inspectors like officers rodriguez and rocha identified