Ok, this is very cool. Michael Connelly and Terrill Lee Lankford have made a three-part film that leads up to the events in The Scarecrow.

Michael Connelly has always tried to give his readers bonus material with each
new novel. Short stories, lost chapters, and visual adaptations. This time we
have something new. A short film called “Conflict of Interest,” which features
the exploits of FBI Agent Rachel Walling leading up to the point she enters the
story of THE SCARECROW. Don’t worry, there are no spoilers here. The story runs
parallel to THE SCARECROW. The case Rachel is working comes very close to the
story Jack McEvoy is chasing. Written by Michael Connelly, the film will be
available in three parts. The first installment is linked below. Watch for part
two next Tuesday, and the finale on May 26, the day THE SCARECROW is published
in the USA and Canada.

Check out chapter one: