The obvious case is, well, obvious.
Shift Sergeant Rodricus Carltez Hurst worked in a Lee County, Mississippi jail. The operations manual at the jail stated that only the Sheriff or his "designee" could talk to the media, though the rule doesn't seem to have been enforced all that well -- the record contained multiple instances where Hurst had spoken to the media during his tenure at the jail.
This time, however, he provided information on a local college player, Chad Bumphis, who had been arrested on New Year's Day after a "big group fight" at a local bar. Sgt. Hurst was quoted in a local newspaper's coverage, which is still available online. Hurst was fired shortly thereafter for violating the Department's media relations policy.