The Hidalgo County Sheriff’s Office arrested Matthew Sepulveda on Tuesday morning for allegedly sexually assaulting a suspect in custody, according to jail records.
On Monday, the agency announced an investigation into alleged official oppression at the Progreso Police Department following an incident of officer misconduct.
The sheriff’s office responded to the department Saturday, June 29, the same day jail records list as Sepulveda’s offense date, according to a news release.
Progreso Police Chief Alberto Rodriguez said he cannot comment about the investigation, nor would he confirm that Sepulveda was employed with the department. The Progress Times, however, reported that Rodriguez said he fired the suspect last week.
Sgt. Frank Medrano with the sheriff’s office confirmed Tuesday that Sepulveda had been employed as a Progreso police officer.
Sepulveda was also previously employed at the county jail, earning a promotion to sergeant, according to a sheriff’s Facebook post from Nov. 15, 2017.
The sheriff’s office is leading the investigation with the assistance of the FBI, according to authorities.
Sepulveda stands charged with one count of sexual assault and one count of violating the civil rights of a person in custody. The latter charge lists the additional qualifier of “sexual,” jail records show.
Bond has not been set as of noon.