Just past midnight of the day Dr. Bass was questioned, what does Jake discover when driven to his home due to an emergency?

When driven to his home due to an emergency just past midnight of the day Dr. Bass was questioned, Jake found his home engulfed in flames. Likewise, Carla's vehicle and an unfamiliar car were also in flames. The fire chief explained the VW next to Carla's was the source of the fire. Further, as the fire was burning evenly in all parts, it was clear that it was arson.