Reading the profile of Michael Brown by Molly Hennessy-Fiske of the Los Angeles Times over the weekend, one paragraph stood out. He was heavyset and quiet, but not shy. He recorded rap music with his best friend and smoked marijuana with other young men. Hennessy-Fiske also points out that cigarillos, the kind that Brown allegedly stole from a convenience store, are “often used to smoke marijuana.” So, it should hardly come as a shock that Michael Brown had marijuana in his system when he was shot and killed by Ferguson Police Officer Darren Wilson on Aug. 9. If anything, this...