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LAS VEGAS (AP) — Police in Las Vegas have released security video they say shows a woman shoving a 74-year-old man off a public bus after witnesses say he asked her to be nice to other passengers.

The video shows Serge Fournier landing face-first on a sidewalk east of downtown on March 21. He died April 23.

This undated Clark County Detention Center booking photo shows Cadesha Michelle Bishop of Las Vegas. On Monday, May 6, 2019, Bishop, 25, was arrested on a murder charge in the death of 74-year-old Serge Fournier. Authorities say he was fatally injured in a fall to a sidewalk when Bishop shoved him and his walker off a public transit bus on March 21, 2019. (Clark County Detention Center via AP)

The Clark County coroner ruled Fournier’s death a homicide resulting from his injuries.

Authorities arrested 25-year-old Cadesha Michelle Bishop on May 6. She has been charged with murder and remains jailed on $100,000 bail pending a preliminary hearing of evidence May 21.

A public defender who represented Bishop in court May 7 didn’t immediately respond Wednesday to messages.

A department statement says investigators still seek witnesses to the March 21 incident.