Article Photos: Police questioning of Zimmerman grew more pointed 20/24

George Zimmerman's defense attorney Don West, right, presents state witness Dr. Hirotaka Nakasone, left, a senior voice recognition scientist with the FBI, with a marked exhibit as Nakasone testifies in the Zimmerman's trial in Seminole circuit court, in Sanford, Fla., Monday, July  1, 2013.  Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin.(AP Photo/Orlando Sentinel, Joe Burbank, Pool)