The unnamed prisoner in Târgu Jiu, in southern Romania, was caught by the prison accounting department after a suspicious level of spending, Romania Insider reports.

An investigation found that he had access to the prison computer system for months, thanks to help from a rogue prison officer.

In scenes resembling a 1980s teen movie, the man modified sentences, detention conditions and other rights for 15 inmates of other prisons.

He also adjusted his own sentence, visitation schedule and bank balance, as well as those of other inmates in his prison.

A number of prison officers have been disciplined and senior management replaced following the incident.