DOWNTOWN BROOKLYN (WABC) -- Charges were pending on Wednesday for a man suspected of the fatal beating of another man at a subway station in Brooklyn .

The 25-year-old suspect was arrested at around 10 p.m. Tuesday when NYPD officers assigned to the subway in Times Square spotted him.

Police Commissioner Jessica Tisch praised the department's domain awareness system, which sent photos of the suspect to officers' phones, resulting in the suspect's quick arrest.

Meanwhile, investigators released new details on what lead to the deadly attack.

Police say the suspect was pulling on the exit gate at the Jay Street-MetroTech station, attempting to gain entry around 3 p.m. Tuesday when the victim approached.

The two exchanged words, and the suspect sucker punched his older victim, who appe

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