In a new interview with ET, former Deputy District Attorney Marcia Clark breaks down the newly released surveillance video of Lindsay Lohan trying on the $2,500 necklace she allegedly stole.Lindsay was charged with one count of felony grand theft for allegedly stealing the necklace from Kamofie & Company jewelry store in Venice Beach. The surveillance video shows four different angles of the store as Lindsay spends 42 minutes trying on various pieces of jewelry.While watching the video, Clark points out what she looks for when preparing for a case. "You watch the actions of the actor. Actions that will indicate to you knowledge and intent and whether this was a knowing act and deliberate act." Clark says. (ETonline.com)