MTA spokesman Aaron Donovan said he was not certain of the man's address and could not confirm whether he was a Darien resident.
Murphy was killed by the 5:38 a.m. train out of New Haven and was struck on the southbound track closest to the platform at Noroton Heights
Eastbound trains bypassed the Noroton Heights, Darien and Rowayton stations after the incident, leaving students enroute to Greens Farms Academy and Fairfield Prep waiting on the opposite platform. Westbound trains are diverted to the New Haven-bound track while the incident is investigated.
Eastbound train service resumed from Darien and Rowayton after 9 a.m. Eastbound commuters from Noroton Heights continue to be bused to Stamford for their trains, Donovan said.
New York bound service is being provided to Noroton Heights commuters from the eastbound platform with scattered delays of up to 15 minutes, Donovan said.
Jaclyn DiScala, a Darien resident on her way to work in New York City, said her train arrived at Noroton Heights shortly after the pedestrian was struck. "There were three covered sections of the person's body on the track, almost underneath the platform, and the person's backpack was lying there,'' she said.
Two police officers were measuring the distance between the items on the track, she said, while an empty train, possibly the one involved in the accident, was pulled up ahead.
"There were blood splatters on the papers on the tracks,'' she said.
DiScala, a Greens Farms Academy graduate herself, said she lent students her phone so they could call their parents and find another ride to school. Other parents were still waiting in the station parking lot, and students returned to their cars.