After a 20-second-long, caught-on-camera dispute, Codrington, 35, slashed Cunningham across the neck with a knife, leaving him to die, Essig said.
At 11:30 p.m. on Dec. 22, Codrington entered a Lower East Side bar with a pit bull and a baseball bat, Essig said.
Afterward, Essig said, Codrington went home, then said he’d “cool off” with a walk through the park.
In May, a 48-year-old man was shot and killed riding a train between Brooklyn and lower Manhattan.
Despite random acts, the number of crimes reported on public transit by September was averaging slightly below pre-pandemic levels, though ridership was also down.