According to state of Florida, the license plate SJE IT is available. Also available are SJE 1T and 5JE IT and 5JE 1T and all variations without the space.
https://services.flhsmv.gov/MVCheckPersonalPlate/
It does look like a Florida salutes veterans plate.
You can get information on the owner of any plate as that is public record.
Bureau of Records
2900 Apalachee Pkwy, MS 89
Tallahassee, FL 32399-0500
HSMV-Records@flhsmv.gov
(850) 617-2702