What started out as a minor theft at a Pasadena Walmart took a deadly turn when the suspect sped off from the scene and crashed into another car, police said.

That shoplifter was speeding away with just $50 worth of stolen toys when she crashed, leaving a 14-year-old girl in the hospital and her mother dead.

It all started around midnight Sunday, police said, when a woman in her 20s was spotted trying to walk out of the Walmart off Fairmont Parkway with baby clothes, CDs and DVDs without paying for the merchandise. Security guards caught her at the entrance, so she returned the items and left the store.

However, about an hour later, police said the woman went back to the same Walmart, filled up a cart with similar items, and tried to leave again. 

A security guard managed to catch up to her in the parking lot, but she refused to hand over the items. 

"One of the security guards tried to detain her and she pushed the security guards to the ground," said Vance Mitchell with the Pasadena Police Department.

According to reports, the woman then peeled out of the parking lot.

Witnesses said she sped onto Fairmont Parkway, ran a red light at Nations Drive, and slammed into the side of a car that had legally entered the intersection. A mother and her 14-year-old daughter were inside the vehicle at the time of the crash.

"The other car had the green light, and the vehicle that had been involved in the shoplifting struck the vehicle in the side," said Mitchell. "As a result, a mother was dead at the scene."

The mother was killed on impact. The daughter was taken to the hospital in serious but stable condition, officers said.  Neither of their names was immediately released.

The shoplifter was also taken to the hospital, but police said she only suffered minor injuries.

The D.A. was on the scene and will assess what charges will be brought on the shoplifter.