CLAY COUNTY, Fla. – A 34-year-old math teacher and athletics coach at a Jacksonville private school, who was arrested on multiple charges related to child exploitation, used internet phone numbers to send sexual messages to a 12-year-old girl for several months, according to the Clay County Sheriff’s Office.
Johnny Robinson III, who was employed at Temple Christian Academy in Jacksonville, was booked into the Clay County Jail on April 15 on multiple counts of transmission of harmful material to a minor and unlawful use of a two-way communication device. His total bond was set at $375,030.
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A day later, on April 16, Robinson III was booked on additional charges of possession of child sexual abuse material after investigators say a forensic examination of his phone revealed multiple such images.
According to CCSO, the investigation began in December 2025 when the 12-year-old girl reported to a Clay County Sheriff’s Office School Resource Officer that she had been receiving sexually explicit messages and images from unknown phone numbers.
According to the victim, who is not a Temple Christian Academy student, according to the school, the messages had started in November 2025 and continued through January 2026.
Investigators say Robinson pretended to be a fellow student at the girl’s school around the same age, referencing friends and classmates known to the victim.
Each time the victim attempted to block a number, messages resumed from a different one, deputies said.
Investigators say they determined all the messages and images were sent using VoIP — Voice over Internet Protocol — phone numbers, a method of communicating through an internet connection rather than a traditional cellular or landline phone.
VoIP numbers are frequently used to conceal a sender’s identity because of the anonymity they can provide, according to investigators.
The explicit messages and images stopped shortly after the incident was reported to law enforcement, according to the Sheriff’s Office.
After an extensive investigation, detectives with the CCSO Internet Crimes Against Children unit identified Robinson III as the suspect.
Temple Christian Academy was notified of the investigation, and Robinson III was immediately placed on administrative leave.
A statement from TCA indicated that Robinson has since been fired.
Late last evening, we were notified that one of our teachers had been arrested. As a result, their employment with our school has been terminated, and they are no longer connected to our school in any way. The situation is now in the hands of the proper authorities, and we will continue to cooperate as needed. Temple Christian Academy prioritizes the safety and well-being of our students. We were also advised that the matter did not involve our school, our staff, or any of our students.
Temple Chrisitian Academy spokesperson
Anyone with information related to this investigation is encouraged to contact Detective Philip Crider at pcrider@claysheriff.com or by phone at 904-264-6512.
Tips can also be submitted anonymously to First Coast Crime Stoppers by dialing **TIPS or through the SaferWatch app.