Detectives from the El Cajon Police Department Family Protection Unit have concluded an extensive multi-month investigation into allegations of sexual assault and rape, resulting in the arrest of a suspect for numerous serious offenses.

During the course of the investigation, detectives identified three victims who reported that the suspect had committed sexual offenses against them while in relationships. Two of the victims were 16 years old at the time of the alleged incidents.

Greyson Washborne, AKA Thomas Menchaca, a 21 year old resident of El Cajon, was arrested on January 21, 2026 and has been charged with 14 counts related to sexual offenses and assault, including rape, sodomy, and forcible sexual assault.

The El Cajon Police Department takes all reports of sexual violence seriously and is committed to thorough investigations to ensure justice for victims and accountability for offenders.

Anyone who has information regarding this investigation or Greyson Washborne, AKA Thomas Menchaca, should contact the El Cajon Police Department at (619) 579-3311, or to remain anonymous, should contact Crime Stoppers at (888) 580-8477.

Completed By:

Sgt. Steven Breakall

Investigations Division

El Cajon Police Department

Reviewed By:

Lt. Eric Thornton

Investigations Division

El Cajon Police Department