Hidalgo County Sheriff Lupe Trevio's resignation on Friday morning came as no surprise to those following the Panama Unit corruption scandal.
The sheriff's son Jonanthan Trevio, trusted deputies and even a top commander have all been arrested and accused of working with drug traffickers.
In his resignation letter, the embattled sheriff made a reference to the scandal which struck both his home and office.
Sheriff Trevio wrote that both "external and internal pressures" from the scandal weighed heavily in his decision to retire in the middle of elected term.
The sheriff wrote that he was not able dedicate himself or focus his attention on the job he was elected to perform.
Action 4 News has compiled a timeline of events that led to resigation.
Road To Resignation
November 2004Lupe Trevio first elected as Hidalgo County Sheriff
November 2008Lupe Trevio re-elected at Hidalgo County Sheriff
November 2012Lupe Trevio wins third term as Hidalgo County Sheriff
December 2012Jonathan Trevio and Alexis Espinoza arrested
January 2013Four indicted in Panama Unit scandal
March 2013Six more people charged in Panama Unit scandal
March 2013Deputy JP Flores charged in Panama Unit scandal
April 2013Deputy Jorge Garza charged in Panama Unit scandal
May 2013Jonathan Trevio and four others plead guilty in Panama Unit scandal
June 2013Two more plead guilty in Panama Unit scandal
July 2013Four more plead guilty in Panama Unit scandal
August 2013Deputy Jorge Garza found guilty in jury trial
August 2013Tomas "El Gallo" Gonzalez and several others indicted in separate drug trafficking case
September 2013Panama Unit sentencing postponed until October
October 2013Panama Unit sentencing postponed until December
December 2013Panama Unit sentencing postponed until February
December 2013Commander Joe Padilla arrested in connection to "El Gallo" drug trafficking case
February 2014Sentencing postponed until April for 11 of the Panama Unit suspects
February 2014Drug trafficker Alvaro Gilberto DeHoyos get 7.5 years in prison for role in Panama Unit scandal March 2014Hidalgo County Sheriff's Office Chief of Staff Patricia Medina resigns