flickr - NTSB's Edward Weener briefs press on details of train derailment

The National Transportation Safety Board says there is no indication that alcohol or brake failure played a part in the derailment of that Metro-North train Sunday in the Bronx. 

NTSB Board member Earl Weener says the train engineer tested negative for alcohol.  He refused to comment on widespread reports that William Rockefeller either "zoned out" or fell asleep behind the wheel when the train jumped the tracks.   Investigators have not yet analyzed data from Rockefeller's cell phone. Weener says the engineer was in the second day of a routine nine-hour five-day shift. 

The train was going 82-miles-an-hour as it entered a 30-mile-an-hour curve at Spuyten Duyval.  Four people were killed and more than 60 were injured.  (Metro Networks Inc)