A Brooklyn road rage incident that ended with a retired NYPD cop shooting a stranger was sparked by one of the drivers cutting the other off, police said Wednesday. The former cop got into a clash with a 22-year-old driver in Brighton Beach at around 2:15 p.m. Sunday, police and sources said. The drivers began cutting in front of one another before quickly hitting the brakes — also called “brake checking." As the conflict boiled over, the retired cop pulled out his gun and shot the man in the leg. Click here to read more on www.nydailynews.com.