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b'Lawyers for a man accused of killing his wife during a cruise ship vacation argue in new court papers that it was not premeditated murder.\\xa0Kenneth Manzanares is accused of killing his wife, Kristy, aboard the \\u201cEmerald Princess" last year. Nancy Grace looks at the case with prosecutor Wendy Patrick,\\xa0defense lawyer Troy Slaten, private investigator Vincent Hill, and Chuck Roberts. Next, Nancy is joined by psychologist Dr. Pat Saunders,\\xa0forensics expert Joseph Scott Morgan, and\\xa0 reporter John Lemley to dig into the murder charges against a man who allegedly drive his car into a restaurant to kill his daughter and daughter in law. Finally, Grace discusses the drug K2 that can turn users into zombies and worse. She consults addiction expert\\xa0Dr. William Morrone.'