Vance told investigators a passenger's bag may have accidentally activated the helicopter's emergency fuel shutoff switch, CNN and NY1, a NY cable news channel, reported, citing unnamed law enforcement officials. The helicopter did not sink and has been secured.
The New York City Fire Department tweeted that its members were with police at the location near 91st Street in Manhattan.
"Despite his short tenure, hearts are heavy with grief", the department said in a statement.
Cadigan had recently graduated from SMU and was in NY to begin a career with Business Insider, according to WFAA TV.
His profile on the site says he was originally from Dallas.
Also killed in the crash was Cadigan, a former WFAA intern and the son of longtime WFAA Production Manager Jerry Cadigan. He made a mayday call to LaGuardia Airport saying that the aircraft experienced engine failure. "East River - engine failure".
Emergency divers had to remove the passengers from tight harnesses while they were upside down.
"It took a while for the divers to get these people out", Nigro said at a briefing.
The official said it was not clear exactly when yellow inflatable pontoons on the helicopter began inflating and why they did not keep the helicopter afloat. "We don't have a great deal to report yet, but will provide regular updates".
Russian forces foil drone attack on Russian-run base in Syria
He says Turkish troops have destroyed water and power stations that supply the town of Afrin, making it hard for people to stay. In the Ghouta offensive alone, at least 1,144 civilians have been killed, including 240 children , the Observatory said.
Richards says once that lever is pulled, it can't be reset unless you leave the chopper and do so yourself.
The cause of the crash has not been determined.
A pilot can free themselves by pulling one lever inside the aircraft, however the passengers all had harnesses that tied them inside with more than a usual seat belt since the group was on a photography mission with the doors removed.
"It was sinking really fast", witness Mary Lee, 66, told the New York Post.
The Liberty Helicopters chopper had been chartered for a private photo shoot, authorities said.
Vance, 33, a pilot for Liberty Helicopter tours, radioed "Mayday!"
Other questions have been raised about the helicopter itself, which should have been equipped with floats when operating around water.
Xinran Jiang witnessed the crash from her bedroom window. All five passengers died.