A firefighter has been reprimanded after chasing down another driver, screaming vulgarities at him and driving off with the man fatally injured.

Firefighter and paramedic Joshua Tullis violated the sheriff’s rules on Oct. 13, 2016, when he got into a confrontation with driver Paul Peterman. His off-duty actions “reflected conduct which does not align with the use of common sense and good judgment,” according to an Internal Affairs investigation released Thursday.

Tullis received a letter of reprimand for his actions.

Peterman’s family “is extremely disappointed” with the punishment, said their attorney Marc Wites. “The family believes that there is an inescapable conclusion that Tullis engaged in criminal behavior and, at worst, behavior that warranted a much more severe sanction or punishment which should have included termination.”