Johnny Lewis was a Hollywood actor who starred in series such as The O.C. and Sons of Anarchy. He soon began exhibiting troubling behavior that led to a grisly murder:

In late October 2011, Lewis lost control of his Triumph motorcycle near Twentynine Palms. At the hospital the staff checked him for signs of a concussion, but he was allowed to leave after tests came back negative. Michael Lewis, however, noticed that his son’s behavior was becoming erratic and bizarre. Had the accident shaken something loose in his brain? he wondered. The elder Lewis scheduled two MRIs, which Johnny refused to undergo. Friends picked up on Lewis’s change in behavior, too. During an acting class in December, he kept speaking in a vaguely British accent. “I asked him about it because I was confused,” Tucker says, “but he shrugged it off.” By the new year Lewis’s behavior would turn from curious to dangerous.