Police Seek Man in Connection With Unprovoked Subway Killing

“M.T.A. video obtained from the Canal Street station is providing our detectives with important information and images shown of a possible suspect,” Chief Jason Wilcox, the head of the Police Department’s transit bureau, told agency board members Monday.

But the city has struggled to adapt camera systems to individual cars, given the challenges of using modern mobile technology in tunnels and stations.

“It’s a physical challenge to get them deep into that system. It’s been a challenge to get radios that work properly,” said Joseph Fox, who retired as the chief of the Police Department’s transit bureau in 2018. “It’s a difficult environment. It’s deep underground.”

On Sunday, there were no police officers on the train where the shooting occurred, police officials say. They had been at the station earlier in the morning but answered a call to another station.

The police were summoned by a fellow passenger’s 911 call while the car was still on the bridge. When the train doors opened at the Canal Street platform, the gunman fled just as officers descended into the station. The suspect gave the gun to a homeless man outside the station on his way out, the two law enforcement officials said. A 9-millimeter handgun was later recovered by the police on scaffolding nearby.

Mr. Enriquez was rushed to Bellevue Hospital, where he died.

Mr. Enriquez, 48, a native New Yorker who had been on his way to brunch, rarely traveled on the subway, first because of the pandemic and later because of concerns about the system’s safety, said his longtime partner, Adam Pollack. He was one of many New Yorkers who have avoided the system since March 2020, both because of remote work and safety concerns: Ridership is only about 60 percent as high as before the pandemic.

A researcher with the Goldman Sachs investment bank, Mr. Enriquez often preferred to take Ubers into Manhattan from his Park Slope home, Mr. Pollack said. He had only recently begun taking the train on weekends because surge pricing was so high, Mr. Pollack said.