take off your shirt the mexican mafia carries a side from their name, mexican mafia tattooed on theirmon 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 ke t number 13, and m is the 13th letter of the alphabet. take off your sh >> 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 thousands of gang members, no system is perfect. neither is shooting lockup "extended stay". >> when shooting "extended stay", you will shoot for several weeks, and you'll be down a week or so and then come back. we shot our first couple of weeks,