Police arrested the 26-year-old Bronx man on Friday who they say tortured and killed his girlfriend — after neighbors chased him down when he brazenly returned to try to get back into his apartment, the Daily News has learned.

Two videos reviewed by The News show a stunned- and winded-looking Robert Strother sitting in the middle of the street one block away from the building, after he had been chased there by locals, as police stand around him and people comment from the sidelines in both Spanish and English on his arrest.

Dressed in a white T-shirt, black sweatpants and white sneakers and sporting a heavy black beard, the hulking Strother at one point shrugs off the hand of a police officer who offers to help him up, then, with labored breathing, slowly gets up out of the street and

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