A man wearing a Federal Railroad Administration vest looks over the wreckage of a a Metro-North Railroad train and an SUV in Valhalla, N.Y., Wednesday, Feb. 4, 2015. Five train passengers and the SUV’s driver were killed in Tuesday evening’s crash in Valhalla, about 20 miles north of New York City. Authorities said the impact was so forceful the electrified third rail came up and pierced the train. (AP Photo/Seth Wenig)

Probe into fatal crash centers on how SUV ended up on tracks

An investigation into what caused a fiery crash that killed a motorist and five rail riders is focusing on how a mother of three described b…