Something Stinks: Expert doubts helicopter pilot’s ‘tether’ crash theory

My first post on this story I wondered if this pilot did a Ted Kennedy? 
I think that's a legit question to ask did he do everything possible to save the lives of his passengers as he should've? 

NY Post reports the pilot of the helicopter that plunged into the East River told cops he believes that a loose tether on one of his passengers’ harnesses cut off the fuel switch, law-enforcement sources said Monday.

The National Transportation Safety Board is investigating the scenario, sources said.

But one expert told The Post that the theory is “highly implausible” since the lever, which is on the floor next to the pilot’s seat in that type of chopper, needs to be pulled up and back to be activated — and “is normally fixed with a breakaway [safety] wire

More here