In this still image taken from security video and provided by the Las Vegas Metropolitan Police Department, a woman shoves a 74-year-old man off a public transit bus on March 21, 2019. The man, Serge Fournier, hit his head on the sidewalk and died a month later. The Clark County coroner ruled his death a homicide resulting from his injuries. Cadesha Michelle Bishop was arrested Monday, May 13, 2019, and is scheduled to appear in court on May 21. (Las Vegas Metropolitan Police Department via AP)

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.

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 was freed on $100,000 bail with electronic monitoring pending a preliminary hearing of evidence May 23.

Public defense attorney Charles Cano, who represents Bishop, didn't immediately respond Wednesday to messages.

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

FILE - This undated file photo provided by the Clark County Detention Center shows Cadesha Michelle Bishop of Las Vegas. Bishop was arrested on May 6, 2019, 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 off a public transit bus on March 21, 2019. The Clark County coroner ruled Fournier's April 23, 2019 death a homicide resulting from his injuries. (Clark County Detention Center via AP, File)
FILE - This undated file photo provided by the Clark County Detention Center shows Cadesha Michelle Bishop of Las Vegas. Bishop was arrested on May 6, 2019, 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 off a public transit bus on March 21, 2019. The Clark County coroner ruled Fournier's April 23, 2019 death a homicide resulting from his injuries. (Clark County Detention Center via AP, File)