NEW RICHMOND, MI (WHTC) - Authorities are awaiting results of toxicology tests before determining why 62-year-old Dave Crosby attempted to walk across the Kalamazoo River on a railroad bridge near New Richmond just before dawn on Saturday. A freight train struck the man, sending him into the river, and although rescue crews were able to pull him out of the fast-moving current quickly, Crosby was still pronounced dead at the scene. Investigators say that he frequently took hikes from his Zeeland area home to South Haven, but couldn’t say why he didn’t use a nearby foot bridge to cross the river. Alcohol didn’t appear to be a factor. A five-hour investigation into this incident closed the tracks, forcing Amtrak to bus Pere Marquette passengers from Holland to Bangor.