Cops recently busted a suspect in the February fatal stabbing of a Brooklyn teen who stumbled into a barber shop after the attack, authorities said early Monday. 

Mamadou Barry, 31, was arrested in Secaucus, New Jersey on Dec. 1 in connection with the Feb. 18 slaying of Mamadou Bah, 19, who staggered into Gentlemen’s Quarters Salon after being stabbed in the torso, cops said. 

Bah was taken to the Kings County Hospital Center, where he was pronounced dead. 

Barry, who was picked up by the New York/New Jersey Regional Fugitive Force, was returned to New York on Dec. 10 and charged with second-degree murder in connection to the slaying.

Both men, who live a short distance from the scene on Church Avenue in Prospect Park South, were involved in a dispute prior to the stabbing, cops said. 

Cops did not have any details on their squabble.