A white NYPD sergeant says that he is being harassed for refusing to take part in the mistreatment of a black officer in his unit.

Officer Dana Harge, who is African American, sued the city in 2016, claiming that his superiors kept him from taking part in high-profile police escorts, hit him with bogus disciplinary complaints, and denied him time off without reason, keeping him from attending pivotal events with his daughter, all on the basis of his race. Sgt. Valentin Khazin, who is white, sued yesterday, saying that he has put up with similar treatment ever since he started declining fellow Highway Patrol officers' directions that he abuse Harge simply because he had filed discrimination complaints.

Khazin has been transferred out of the unit, badmouthed to his new colleagues by his old superiors, and even possibly tracked by GPS, according to his federal lawsuit.

"It was just constant nonsense," Khazin told the Daily News, starting when he refused to decline Harge's time off request to attend his daughter's Little League game.

From then on, he was followed around the city, brought in for a series of allegedly baseless disciplinary proceedings, and denied time off himself, all the while being told to find "endless work" for Harge to do, according to the suit. Last year on Father's Day, Khazin alleges that his bosses kept him working for 24 hours, claiming no one else was available.

Khazin arrived at the prestigious Highway Patrol unit in 2015 after climbing through the ranks, but within a year or so was transferred out again to the 9th Precinct in the East Village, and even then allegedly subjected to harassment from afar.

Khazin also alleges the existence of summons quotas across Highway Patrol.

Harge and Khazin aren't the only officers to accuse the elite unit of racism. Within months of Harge's suit last year, another black highway cop sued making similar claims. Sgt. Andre Sce also alleged that he had been denied high-profile escort assignments. He said further that his superiors falsely claimed he had gone absent without leave, and that a captain falsely claimed he was suicidal in an attempt to have his work guns confiscated.

Earlier this year, a Queens jury found a man arrested by the borough's Highway Patrol, where Khazin worked, not guilty of driving while high. The verdict came after the defense showed holes in the arresting officer's account, and revealed that the officer had praised a motorist ramming into a crowd of Black Lives Matter protesters on Facebook. The officer captioned video of the ramming, "My new hero," and that was just one of many inflammatory, racially charged posts.

Khazin himself has been the subject of two false arrest suits, both out of Flatbush. In one, a teen alleged that Khazin and a partner arrested him for waiting in a double-parked rental car for his mother, who had rented the car to return. The boy was held for 15 hours. Prosecutors declined to pursue the charges. The city settled both lawsuits for an undisclosed amount of taxpayer money.

The city Law Department said it is reviewing the latest claims.