Crews dispatched late Friday evening.
The unit, a merger between police and fire, was created after two on-duty firefighter deaths.
Michelle Thomas was attempting to intervene when the car thief continued to drive.
Group goes to funeral of Lt. Matt LeToureau, who died in the line of duty.
Rex Davis is accused of setting house fire, threatening to kill people in blaze.
Fire Investigative Unit to work with prosecutors in solving fire cases.