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A Leto High School teacher is facing criminal charges after Hillsborough County deputies say he engaged in inappropriate conduct with a 17-year-old student, including kissing the student and displaying an obscene photo. Authorities identified the suspect as 33-year-old Gregory Sinadinos II, an industrial education teacher at the Tampa campus.
According to the Hillsborough County Sheriff's Office, Sinadinos was taken into custody Thursday and is facing multiple charges: battery, authority figure soliciting or engaging in lewd conduct with a student, and selling or distributing obscene material to a minor. Detectives say they learned of the alleged conduct during an investigation and confirmed the student is 17 years old.
🚨𝐓𝐞𝐚𝐜𝐡𝐞𝐫 𝐀𝐫𝐫𝐞𝐬𝐭𝐞𝐝 𝐟𝐨𝐫 𝐈𝐧𝐚𝐩𝐩𝐫𝐨𝐩𝐫𝐢𝐚𝐭𝐞 𝐂𝐨𝐧𝐝𝐮𝐜𝐭🚨
— HCSO (@HCSOSheriff) February 26, 2026
The Hillsborough County Sheriff’s Office arrested Gregory Sinadinos II, 33, a teacher at Leto High School, after detectives learned he engaged in inappropriate conduct with a 17-year-old… pic.twitter.com/jpxlFYFXJS
Teacher's Role at Leto High
A review of Leto High School's online staff directory lists Sinadinos as an industrial education teacher. The directory page, which includes his name and department, ties him to the school located at 4409 W. Sligh Avenue in Tampa.
Charges and Legal Next Steps
The sheriff's announcement lists the charges against Sinadinos as battery, authority figure soliciting or engaging in lewd conduct with a student, and selling or distributing obscene material to a minor. These remain criminal allegations, and he is presumed innocent unless and until proven guilty in court, where the details of the case are expected to be sorted out.
Local Context
Hillsborough County has seen similar cases before, with prior arrests of school staff on allegations of misconduct involving students leading to broader scrutiny of adults in positions of trust. Bay News 9 previously reported on a case in which an educator and coach faced multiple charges after investigators identified additional victims.
