A year after his father's death, Oskar, a troubled young boy, discovers a mysterious key he believes was left for him by his father and embarks on a scavenger hunt to find the matching lock.

The inner workings of the judicial system, beginning with the arraignment, and continuing through the prosecutors' complicated process of building a case, investigating leads and preparing witnesses for trial.

The third installment of the “Law & Order” franchise takes viewers deep into the minds of its criminals while following the intense psychological approaches the Major Case Squad uses to solve its crimes.

The third installment of the “Law & Order” franchise takes viewers deep into the minds of its criminals while following the intense psychological approaches the Major Case Squad uses to solve its crimes.

In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.