Sun. 3/2 11a: How does heroin end up on the streets of Chicago? Why are minors being held in solitary confinement – even when they haven’t been convicted of a crime? And what happens when you pair poets with investigative journalists? These are just a few of the questions explored in the second pilot episode of “Reveal,” a new radio show dedicated to investigative journalism from The Center for Investigative Reporting and PRX.