High School Tennis Coach Arrested for Indecent Liberties Against Child

McLean Police District – A 29-year-old high school tennis instructor is facing three felony charges of taking indecent liberties of a child by a custodian for an inappropriate sexual relationship with a student at George Mason High School. Our detectives began their investigation on June 16, after it was learned that Rafael “Rally” Diokno, of Falls Church, was having unlawful sexual contact with a student. Diokno was a seasonal contract employee with the Falls Church City Public Schools. Detectives determined the unlawful conduct began in May of this year and the acts occurred at different locations within the confines of Fairfax County. Yesterday, detectives from our Major Crimes Bureau Child Abuse Squad arrested Diokno, and he is currently being held at the County’s Adult Detention Center without bond.  

Detectives are seeking anyone who has information about this investigation or may have had inappropriate contact with Diokno to call our Major Crimes Bureau detectives at 703-246-7800, option 3. Tips can also be submitted anonymously through Crime Solvers by phone – 1-866-411-TIPS (866-411-8477), by text – Type “FCCS” plus tip to 847411, and by web –Click HERE. Download our Mobile tip411 App “Fairfax Co Crime Solvers”. Anonymous tipsters are eligible for cash rewards of $100 to $1,000 if their information leads to an arrest. 

Victim specialists from our Major Crimes Bureau’s Victim Services Division have been assigned to ensure that the victim is receiving appropriate resources and assistance. 

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