Reports claim 74-year-old Serge Fournier was reportedly telling the woman on the bus to be nicer to other passengers.
Video then shows the 74-year-old being shoved down the steps of the public transport bus and slamming his face on concrete.
Cadesha Michelle Bishop was arrested on a murder warrant last Monday after he died in hospital of his injuries.
WATCH: moment woman shoves man off bus to his death
WARNING: some viewers may find this footage distressing.
Las Vegas Police have released CCTV showing the gut wrenching moment a woman pushed an elderly passenger off a bus to his death.
WARNING: some viewers may find the following video distressing
