The suspect first led authorities in a reckless chase and smashed into multiple vehicles, dodging PIT maneuvers while fleeing authorities.
The suspect in a Nissan four-door sedan fled at high speeds, weaving through traffic, blowing through red lights and crashing into several cars in the effort to escape.
By the end of the chase, the car was dragging its rear bumper along as it continued to flee.
At several points, the suspect was trapped in traffic, and chose to smash cars aside in an effort to get through the jam.
The chase came to an end around 4 p.m. in Diamond Bar as the driver came to a stop after hitting several cars.
The suspect remained in the car as authorities tried to coax her to emerge. It appeared officers were firing less-than-lethal rounds into the vehicle, shattering the window. The suspect remained in the vehicle.
SWAT vehicles took up positions in front and in back of the sedan as the standoff stretched into its second hour.
Officers then inserted a tear gas canister into the vehicle to try to get the driver out. A young girl then emerged from the car, followed by the woman.
Authorities took the 30-year-old woman into custody. LASD Lt. Todd Knight said they weren't aware the girl was inside the car.
The relationship between the girl and woman is unknown.
When the girl exited, a SWAT officer came to help her. She was transported in an ambulance to be treated.
Authorities say they don't know if the suspect was under the influence or may have been suffering from mental health issues.