BULLHEAD CITY, Ariz. – August 21, 2025

UPDATE: The August 20, 2025 shooting incident is now being investigated as a homicide. The victim, Andrea Jane Kristy, 58, of Bullhead City, succumbed to her injuries yesterday afternoon at Sunrise Hospital in Las Vegas, NV. Charges have been refiled for the shooter, Tyler Rey Nelson, 21, on counts of second-degree murder and trespassing. Charges have also been refiled for his mother, Toni Marie Sierra, 40, for facilitation of second-degree murder, burglary, and trespassing.

On Wednesday, August 20 at 7:40 p.m., Bullhead City Police responded to a weapons offense in the 1000 block of Holly Street. A 58-year-old female resident was shot multiple times in the back. Officers immediately provided medical aid until paramedics arrived. The victim was initially transported to Western Arizona Regional Medical Center and later transferred to a Las Vegas, Nevada hospital for further treatment.

Following an investigation and interviews, detectives arrested two suspects: Tyler Rey Nelson, 21, of Fort Mohave, and his mother, Toni Marie Sierra, 40, of Fort Mohave. Nelson was arrested for the incident during a traffic stop at approximately 8 p.m. near Alona’s Way and Trane Road in Bullhead City, where a firearm was located inside the vehicle. Sierra was contacted by police at her residence in Fort Mohave and taken into custody for her involvement.

Detectives determined that Nelson and Sierra went to the Holly Street residence to confront the resident about stolen property. During the confrontation, Nelson reportedly shot the homeowner, who was unarmed at the time. Both suspects were booked into the Mohave County Jail in Kingman. Additional charges may be pending as the investigation continues.

The information above is provided as a public service and as a demonstration of government transparency. Persons arrested, accused, or sought for questioning should not be presumed guilty of any charge or allegation. In some cases, criminal charges are not pursued against persons initially arrested, accused, or sought for questioning.

Investigative Assistant, Property Crime Unit
Bullhead City Police Department