Sierra Wilson Cahoon, her son, and unborn baby killed in intentional pedestrian collision with driver William David Phillips, 33, in Jefferson City, Tennessee

Then, police say Phillips drove onto the sidewalk, struck the Cahoons and crashed into a fish hatchery. John Carberry owns Sustainable Aquatics and says thousands of fish died and more than 10,000 gallons (37,800 liters) of water spilled from the building.

An arrest warrant says a driver accused of intentionally running over pedestrians in Tennessee, killing a pregnant mother and her toddler son, told police that a voice was directing his actions.