A motorist has been arrested on murder charges after authorities say she slammed her SUV into a city bus in Los Angeles. That killed at least two people and injured six others in a prelude to a second deadly tragedy: the fiery crash of a TV news helicopter used by NBC and Telemundo that was covering the collision. Police say 36-year-old Bailee Lynn Rios was arrested Tuesday night and is being held at a Los Angeles jail with bail set at $4 million. Information on a lawyer who could speak on her behalf was not immediately available. NBC4 Los Angeles identified the two on the helicopter as reporter Eliana Moreno and pilot George Marciniw.