Martial Arts Instructor Arrested for Sexually Assaulting Juvenile

Franconia Police District – Detectives from our Major Crimes Bureau Child Abuse Squad have arrested a 35-year-old man for multiple sexual assaults against a juvenile. Detectives were notified on Nov. 24 after the victim disclosed to a parent that he was sexually assaulted by an instructor on several occasions since the summer.

Detectives determined Kai Rendon, of Alexandria, was a martial arts instructor at Potomac Kempo, 5958 Kingstowne Center, in Kingstowne. On multiple occasions, Rendon took the victim to his Alexandria home during instructional periods where he sexually assaulted the victim. Wednesday night, detectives arrested and charged Rendon with three counts of carnal knowledge and three counts of indecent liberties by custodian. He is currently being held at the Adult Detention Center without bond. 

Rendon worked at Potomac Kempo from January 2019 to November 2021. Detectives are asking anyone with information about this case or believe Rendon had inappropriate contact with them or their child to please call our Major Crimes Bureau 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 dollars if their information leads to an arrest. Those who wish for a detective to contact them, please leave contact information. 

Victim specialists from our Victim Services Division have been assigned to ensure that the identified victim receives appropriate resources and assistance. 

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