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PHOTOS: As Mexico's drug war gets grittier, so do nicknames

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">FILE - In this Jan. 6, 2012 file photo, Baltazar Saucedo Estrada, alias &#34;El Mataperros,&#34; or &#34;The Dog Killer,&#34; is escorted by members of the new Fuerza Civil police force as he is presented to the press in Monterrey, Mexico. According to police, Saucedo is an alleged member of the Zetas drug cartel and ordered his henchmen to set fire to a casino in the northern city of Monterrey in 2010 to punish the owners for failing to pay protection money, which killed 53 people. The source of his nickname remains unclear: Cartels sometimes refer to rivals and police as &#34;dogs,&#34; and cartel recruits reportedly are ordered to hack up the animals as training for human dismemberment. &#40;AP Photo&#47;Hans-Maximo Musielik, File&#41; (AP Photo&#47; Hans-Maximo Musielik)</span></div>
February 22, 2013 8:45:52 AM PST