Responding police noted Mark McKeown’s “slurred speech, odor of alcohol” and “glassy and bloodshot eyes” at the scene of the rear-end collision Saturday night along the 400-block of VFW Parkway in

An off-duty sergeant with the Boston Police Department is accused of driving drunk and crashing into another car on VFW Parkway. The sergeant, Mark McKeown, was also described in a police report of behaving in a vulgar manner toward Brookline police officers who arrived at the scene of the crash.