Catalytic converter thieves caught in the act by police: VIDEO

FONTANA, Calif. -- Four people were detained in southern California after police caught them actively sawing-off a catalytic converter from a car parked in a driveway.

Newly-released body camera footage shows the police catching the suspects as they attempted to steal a catalytic converter. The recording then shows police detaining the suspects at gunpoint.

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A Chicago woman was stunned to look out her office window at the end ofher work day and see four thieves stealing her catalytic converter. The incident was caught on video.

Police say they were patrolling the neighborhood when they witnessed the suspects stealing the sought after car part.

In all, police found five catalytic converters in the suspects' car.