Man Arrested Following Alleged Sexual Abuse Indictment

DELHI — Sheriff Craig S. DuMond announced the arrest of 19-year-old Mario A. Sierra of East Meredith on a Sealed Indictment Warrant issued by Delaware County Court after a Grand Jury action.  

On Friday, September 27th, 2024, the Delaware County Sheriff’s Office Criminal Investigation Division received a complaint from the Oneonta City Police Department that a 19-year-old male was suspected of having sexual relations with a 14-year-old victim in both the City of Oneonta, as well as Delaware County, during the summer of 2024.

On May 22nd, 2025, Investigators presented the results of the investigation to the Delaware County Grand Jury.  At the conclusion of their deliberation, the Delaware County Grand Jury handed down a Sealed Indictment Arrest Warrant charging Mario A. Sierra with six counts of Rape in the Second Degree, a Class D Felony, and two counts of Criminal Sexual Act in the Second Degree, a Class D Felony. This warrant was immediately executed later that same day by members of the Delaware County Sheriff’s Office Road Patrol Division. Sierra was taken into custody without incident and transported to the Delaware County Correctional Facility pending arraignment. 

On Friday May 23rd, 2025, Mario A. Sierra was arraigned in Delaware County Court on the charges. Following the arraignment Judge Gary Rosa remanded Sierra back to the custody of Delaware County Correctional Facility with bail set at 25,000 dollars cash, 50,000 dollar secured bond, pending further action by the Delaware County Court.