Second teen arrested for murder in intentional hit-and-run killing of retired police chief in Las Vegas

A 17-year-old driver intentionally hit and killed a retired police chief who was bicycling in Las Vegas.
Video shows the driver asking "Ready?" before striking the victim, while a passenger filmed and laughed.
The driver was arrested shortly after; the passenger was arrested days later.
Prosecutors are pushing to charge both teenagers as adults with murder.
The suspects struck another bicyclist and car before hitting the retired officer.