A Boston Police sergeant was arrested after cops say he was “highly intoxicated” when they responded to a rear-end collision in Brookline.

“Trooper, do you understand who I am?” off-duty BPD sergeant Mark McKeown allegedly told a state trooper trying to perform a field sobriety test on the sergeant.

A police report says that the responding trooper and Brookline Police officer immediately noted 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 Brookline. The police say that McKeown was at fault.

McKeown, 52, of Dedham, was charged in Brookline District Court Monday with operating a motor vehicle while intoxicated. A BPD spokesman said he has been assigned to administrative desk duty.

McKeown, according to the report, told the trooper and officer that despite his “5” drinks while attending a Bruins game that night, he was good to drive and that the only thing “bull(expletive)” about the situation is that he was having to deal with these “scumbag” cops on his way home.

Other pearls allegedly dropped by McKeown both before and after being handcuffed and read his Miranda rights — which includes the right to remain silent — included calling the arresting officer a “sh— trooper,” both officers, “f—ing p—ies” and after being advised he was being recorded and that was in his best interest to not behave that way that he didn’t “give a f—” and to “shut the f— up.”

McKeown’s frustration wasn’t just directed at the cops, however, as the trooper says he had to repeatedly ask McKeown to stop “yelling profanities” at the other driver — who was not intoxicated — as the driver was giving his own statement to police.

The trooper notes that McKeown kept saying, “with slurred speech,” that he didn’t know where his license and registration was but wouldn’t look for it either. He also allegedly claimed to have arthritis so he couldn’t do a sobriety test. Then that he had a disease he couldn’t pronounce. But, with the threat of arrest for refusing presented, he complied and proceeded to bomb each test, according to the report.

A witness produced a dashcam video that purportedly shows McKeown driving his gray 2019 Jeep Grand Cherokee “at a high rate of speed past his vehicle and colliding with the concrete siding of a rotary prior to crashing into” the other vehicle.