Mario Alberto Peña
Mario Alberto "Popo" Peña (22 October 1980 – 19 March 2013) was a US-born Mexican suspected criminal and high-ranking member of the Gulf Cartel, a criminal group based in Tamaulipas, Mexico. He started his criminal career in a local Texan gang before joining the Gulf Cartel, where he worked as a regional leader in an area known as La Ribereña, across the border from Starr County, Texas.