RubyRhapsodies
Immortal Traceur
Drug them up. Push them in front of a train. Leave alcohol bottles scatted around the area.
Unfortunate accident.
but what about the security cameras
emotion_8c
Security cameras around railways are usually located at junctions and rail hubs.
On stretches of track through cities and towns, unless you're at a crossing, there probably isn't a camera around.
A second option of this plan is to wait for the train to go under a bridge and just push them off the bridge right before the train gets to them. Suicides this way are incredibly common on the eastern seaboard and certain asian counties. Top that off with a positive drug test for any opiates and/or narcotics and you easily have a drug riddled depressed guy committing suicide or, again, an unfortunate accident.