A hung jury led a judge to declare a mistrial for Karen Read, but news keeps coming out. Dateline producer Sue Simpson is back with news about the lead investigator and the lead blogger. In New Mexico the Hollywood actor's trial, on an involuntary manslaughter charge for an on-set shooting, starts next week. NBC News correspondent Chloe Melas tells us what to look out for. And if travel is on your summer itinerary, advice from a former Secret Service agent can help keep you safe.