GARDEN GROVE, Calif. — A Garden Grove Police Department officer who worked with the department’s youth Explorer Program was charged Tuesday with multiple felonies alleging a sexual relationship with a 16-year-old volunteer, authorities said.
Allegations, arrest and status
Prosecutors with the Orange County District Attorney’s Office filed five felony counts against 32-year-old Roberto Machuca, charging him with three counts of unlawful sexual intercourse with a minor, one count of sexual penetration by a foreign object of a minor, and one count of oral copulation with a minor.
Machuca, a Riverside resident who had been employed by the Garden Grove Police Department since 2019, served at one point as an adviser for the department’s Explorer Program — a volunteer initiative for people ages 14 to 21 that gives young residents experience working alongside law enforcement.
The department says the alleged victim was a 16-year-old volunteer in that Explorer Program. The relationship is reported to have begun in May and the department learned of it on June 26. Machuca was arrested the following day, placed on leave and has since been terminated from the department.
Charges, plea and court dates
At his arraignment, Machuca pleaded not guilty to the charges. The court set his bail at $100,000 and ordered him to surrender any firearms and his passport. A pretrial hearing is scheduled for Aug. 4 at the West Justice Center in Westminster.
| Alleged offense | Count |
|---|---|
| Unlawful sexual intercourse with a minor (3+ years younger) | 3 felony counts |
| Sexual penetration by a foreign object of a minor | 1 felony count |
| Oral copulation with a minor | 1 felony count |
Official reaction
"Law enforcement officers occupy a position of immense trust, and he exploited that trust to take advantage of a child for his own sexual gratification,"
The remark came from Orange County District Attorney Todd Spitzer, who said the conduct “will never be tolerated among the ranks of those sworn to protect and serve, and justice will be pursued to the fullest extent.”
The Garden Grove Police Department declined to comment on the pending charges when contacted by media.
Local implications and the Explorer Program
The Explorer Program is intended to be a pathway for youths interested in law enforcement careers; it places volunteers alongside sworn officers and civilian staff for training and exposure to police work. The department’s decision to fire Machuca after his arrest reflects the immediate personnel action agencies commonly take when an employee faces serious allegations — especially those involving minors.
For Garden Grove residents, the case raises questions about oversight, volunteer safeguards and background checks for those who work with young people. City leaders and police administrators typically review policies and training after incidents that involve alleged misconduct with minors. Any formal review or policy changes by the Garden Grove Police Department have not been released publicly as of this report.
- Who: Roberto Machuca, former Garden Grove police officer and Explorer Program adviser.
- Allegations: Sexual relationship with a 16-year-old Explorer volunteer; five felony counts filed.
- Legal status: Pleaded not guilty; bail set at $100,000; pretrial hearing Aug. 4.
Machuca’s attorney declined comment through court records in one report. Earlier accounts indicated he was placed on administrative leave after his arrest and later fired. Court filings show he surrendered to authorities after the department was notified on June 26. Reports indicate the alleged relationship began in May, but prosecutors will need to present evidence in court to prove the charges.
As the case moves through the criminal justice system, it is likely to draw scrutiny from parents and community groups concerned about youth safety in city-run programs. The Explorer Program serves as an early-career stepping stone for local teens; any policy review could affect screening, supervision and reporting procedures for volunteers and officers assigned to youth outreach.
Updates will be posted after the Aug. 4 hearing and as the Orange County District Attorney’s Office and Garden Grove Police Department release further information.
