Every year, 310 killings in France go unsolved, leaving the victims' crushed families in a state of endless grief       The French judicial system is implacable there's no money to continue investigating cases that lead nowhere       Hunting down murderers to help bereaved families get justice is more than just a job, it's a duty for Thomas Bareski, a retired, hotshot police detective       A wandering, footloose, nature-loving soul who lives out of his van, Thomas Bareski isn't just a one-of-kind man, he's also an extraordinary police officer who's ready to upend his way of life to fulfill his mission