A lawyer for Rockefeller hasn't returned calls. A former boss calls Rockefeller a stellar employee.
While investigators have yet to finish talking with him, a darkening cloud of questions is forming around Rockefeller because the Metro-North Railroad train went into the curve at 82 mph, or nearly three times the speed limit.
As National Transportation Safety Board continued working Tuesday to determine what caused the Sunday morning wreck in the Bronx, Gov. Andrew Cuomo said Rockefeller should be disciplined for "unjustifiable" speed.
Rockefeller has stayed out of sight.
"This is a man who is totally distraught by the loss of life, and he's having a tough time dealing with that," Bottalico said.
Weener said Monday that information from the data recorders indicates the throttle was let up and the brakes were fully applied just five or six seconds before the train came to a grinding, smoking halt.
Investigators said it was soon to say whether the excessive speed was the result of human error or a mechanical problem.
But Weener said investigators hadn't found any evidence of brake trouble during the train's nine previous stops.
Investigators began talking to the engineer Monday but didn't complete the interview. It is unlikely to resume until Wednesday, NTSB spokesman Keith Holloway said Tuesday.
He said he had no information on why; Bottalico said the session wasn't finished because Rockefeller was distressed and hadn't slept in almost 24 hours.
Rockefeller was given drug and alcohol tests — the results weren't available Monday, Weener said — and investigators were examining the engineer's cellphone. Engineers can have cellphones but are not allowed to use them during a train's run.
The New York Police Department is conducting its own investigation, with help from the Bronx district attorney's office, in the event the derailment becomes a criminal case.
Whatever the findings on the cause of the crash, Cuomo said Tuesday the engineer could be faulted for the train's speed alone.
"Certainly, we want to make sure that that operator is disciplined in an appropriate way. There's such a gross deviation from the norm," he said.