Los Angeles County Deputy Sheriff Kenneth Alexander, 46, pleaded no contest on Friday to a felony charge of sexual acts with a minor.
Alexander, who was assigned to the Marina del Rey station, was arrested on Oct. 20, 2011 for allegedly having sexual relations with a 15-year-old girl he met while on duty.
An informant contacted the Los Angeles County Child Abuse Hotline on Aug. 16, 2011, and detectives began following up on leads until eventually interviewing both the victim and Alexander.
He was placed on administrative leave with pay on Sept. 20, 2011 until he was arrested a month later.
Alexander is currently free on his own recognizance. He faces five years formal probation, 60 days in county jail and one year of sex offender treatment, according to the district attorney's office. Los Angeles Superior Court Judge Mark Windham will impose sentencing on Aug. 29.
If Alexander is arrested for any matter before the Aug. 29 hearing, he could face up to three years in prison.