A former New Orleans police officer convicted and then exonerated of negligent homicide in a high-profile 1992 police-brutality case has been arrested after he allegedly pulled a gun on a motorcyclist and claimed to be a police officer during a road-rage incident in St. Tammany Parish, authorities said. Kevin Fenner, 47, of Madisonville, was booked Feb. 11 on a warrant for aggravated assault and impersonating a police officer in connection with an incident last month in Goodbee. Fenner was fired by the New Orleans Police Department after he was convicted of negligent homicide in the 1992 shooting death of an 18-year-old man in eastern New Orleans, a case that sparked protests and fueled complaints about police brutality against young black men. The conviction was overturned on appeal, but Fenner, who works as a funeral director in Covington, never rejoined the police force. On Jan. 9, Fenner confronted Seth Crane, 21, of Madisonville, who had passed Fenner’s car on a motorcycle and stopped at the Goodbee Quick Stop on U.S. 190, St. Tammany Parish Sheriff’s Office spokesman James Hartman said. Fenner allegedly identified himself as a police officer and pointed a revolver at Crane, ordering him to kneel on the ground. He then berated Crane for his driving and demanded to see his license and registration, Hartman said. "He told him to slow down and that he ought to be ashamed of himself," Hartman said. "Then he left after telling him not to let it happen again." Crane jotted down the license plate number of Fenner’s green Toyota Corolla and called the Sheriff’s Office the next day. Deputies obtained an arrest warrant for Fenner after two witnesses confirmed Crane’s account of the incident.