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      Former Hidalgo County Sheriff's Office chief of staff facing charges

      Former Sheriff Treviño's son Jonathan (second from right) was arrested in the Panama Unit Scandal

      The former Chief of Staff at the Hidalgo County Sheriff TMs Office entered a guilty plea to a criminal charge in federal court.

      Court documents unsealed on Friday afternoon reveal that Maria Patricia Medina, better known as Pat Medina, is facing a failure to report a felony charge.

      Federal prosecutors alleged that Medina witnessed ex-Hidalgo County Sheriff Lupe Trevio committing acts of money laundering but failed to report it.

      The former sheriff allegedly received illegal cash campaign contributions from Weslaco drug trafficking suspect Tomas El Gallo Gonzalez.

      Medina, who was the Trevio's chief of staff and re-election campaign treasurer, admitted she helped Trevino to hide the donations by falsifying election records.

      According to a criminal information, it all happened between July and August 2011.

      Both Medina and Trevino recently resigned from their posts last month following pressures from investigation into the Panama Unit corruption scandal.

      No charges have been filed against Trevio at this time but court records reveal Medina's case involves a joint investigation.

      Agents with the Texas Department of Public Safety, U.S. Drug Enforcement Administration (DEA) and U.S. Homeland Security Investigations all worked together in the case.

      Medina appeared before U.S. District Court Judge Ricardo Hinojosa in McAllen on Friday afternoon.

      The former chief of staff avoided an indictment by entering a guilty plea.

      Medina is expected to be sentenced on July 3rd where she is facing up to three years in prison and a $250,000 fine.