Mysteries surrounding Jeffrey Epstein's death now make it increasingly difficult for "grown ups" in the mainstream media to dismiss it all as just another crazy conspiracy theory. What's causing all these mass shootings? Some say guns. Dr. Christopher J. Ferguson, professor of psychology and criminal justice and author of "Moral Combat: Why the War on Violent Video Games Is Wrong" says Call of Duty, Halo, and Grand Theft Auto play no role in gun violence. Dr. Ferguson also says when you examine the numbers, gun violence in America may actually be declining.  What can chimpanzees teach us about Donald Trump? We talk with Animal Behavior Biologist Dr. Jennifer Verdolin, author of "Wild Connection: What Animal Courtship and Mating Tell Us about Human Relationships" and "Raised by Animals: The Surprising New Science of Animal Family Dynamics." Time Code: David digs into Jeffrey Epstein's mysterious death and why mass shootings are acts of terrorism (1:32.3) Dr. Christopher J. Ferguson says video games don't make us violent and American mass shootings may not be as widespread as we think (53:31.9) Dr. Jennifer Verdolin on chimps, Trump, elephants and spider sex. (2:20:53)