Serge Fournier, 74, was riding on a bus in downtown Las Vegas, US, on March 21 when he got into a row with another passenger.
Witnesses told police that Bishop, who was with her young son, had been swearing at people on the bus when Fournier told her to "be nicer to passengers".
Las Vegas police have made an arrest in the case of an elderly man who died after being pushed out of a bus. He was 74 years old.
Bishop then pushed Fournier forcefully with both hands, causing him to fall and hit his head on the concrete sidewalk below.
When officers first arrived at the scene of the incident, Fournier said he didn't want to receive any medical attention even though he was bleeding from the head.
Bishop was previously convicted twice in 2012 and 2013 of domestic violence misdemeanors. He died a month later on April 23. Later that night, he drove himself to the hospital due to his injuries. Detectives managed to identify Bishop through bus surveillance video and arrested her this week. "People need a little more patience than what they have these days", said the man's neighbour, Trevor Taylor.
Cadesha Bishop, 25, was arrested on May 6 and charged with open murder of an elderly-vulnerable person.
Of Fournier, Taylor told the station he'll "always remember him being a wonderful person".
She's now being held at a Clark County Detention Center.
A judge has ordered Bishop be held on $100,000 bail pending a preliminary hearing of evidence on May 21. A Clark County public defender's official did not immediately respond Thursday to messages.