LA PLATA, MD—Tony Covington, State’s Attorney for Charles County, announced that on Friday, June 12, 2026, Elmer Geovanny Marquez-Orellana, 27, of Waldorf, entered a guilty plea to Sex Abuse of a Minor and Second-Degree Rape. As a part of his plea, Marquez-Orellana will have to register as a lifetime Tier 3 Sex Offender.

On January 19, 2026, officers with the Charles County Sheriff’s Office responded to a Waldorf residence for a reported sexual assault involving a child. Upon arrival, they made contact with the 13-year-old victim and her parents. The victim disclosed that she was sexually assaulted by Marquez-Orellana earlier that morning.

An investigation revealed that Marquez-Orellana had been visiting the victim’s family on January 18, 2026, and remained overnight at the residence. During the early morning hours of January 19, 2026, the victim got out of bed to get a bottle of water located in the garage. Marquez-Orellana, who was also in the garage, grabbed the victim and began sexually assaulting her. Despite the victim repeatedly telling him to stop, Marquez-Orellana removed the victim’s clothes and continued the assault.

The victim’s mother eventually entered the garage after hearing the victim saying “no.” When she entered, she observed both the victim and Marquez-Orellana unclothed.

Investigators reviewed in-home surveillance video, which captured Marquez-Orellana entering the garage and the victim entering three minutes later.

A Sexual Assault Nurse Examination was conducted on the victim, and forensic testing later identified DNA consistent with Marquez-Orellana on the victim.

A sentencing date has been set for August 27, 2026, at 2:30 p.m.