Jeremy Koch drove down a country road in the darkness, carting his 14-year-old son to 5:30 a.m. basketball practice. He glimpsed a Dodge Ram pickup on the shoulder, its engine revving, exhaust billowing from the tailpipe into the January morning.“Maybe he’s stuck,” Koch, 41, thought as he pulled up, walked to the driver’s side and tapped on the window.The man inside didn?...