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>> shot one time in the back of the head. >> i felt like i was in a made-for-tv movie, like, this can't be happening. >> what did happen? >> the hunt is on, a gleaming yacht. >> i thought, why did you get on that boat? >> a scheming businessman, and a missing fortune. >> you're a multimillionaire, and you don't have any money. >> from high seas venture to heart stopping murder. >> i don't think i'll ever get another case quite like this. >> "who killed the radio star?" hello, welcome to "dateline ext extra," fans woke up everything morning to his golden voice. he was a d.j. who found fame and ...

>> midwest. this multi-vehicle pile-up in wichita, kansas, just one of hundreds of accidents emergency workers have been dealing with caused by that storm, which will continue throughout the weekend. the first of a series of protests leading up to donald trump's inauguration took place in washington d.c. today. thousands attended the march organized by the reverend al sharpton's national action network, and 16 other civil rights groups. now back to "dateline extra." welcome back to "dateline ext extra." as investigators questioned keith griffith about where he was the night of julie's murder...

Some things, mind you, including a bloody fireplace poker that turned out to be the murder weapon. >> the marking on her head was the exact replica of the shape of the fire poker, the end of the poker. >> they cataloged everything they found. broken glass in the backdoor. they even took the knobs off drawers and sent them to the lab hoping the intruders left dna or fingerprints on them. and then quite unexpected. then, quite unexpected, something remarkable turned up. and right through the front door of the local newspaper -- so what did you think when you first read that document? >> i felt i...

Here's moscow celebrating over red square. that happened moments ago. the burlington electric department found malware linked to russian hacking. a code discovered in one laptop. that laptop not connected to the organization's grid. the utility is taking steps to prevent further infelt trailtra its grids. now back to "dateline ext extra." welcome back to "dateline extra." i'm tamron hall. when ralph candelario's account of the home invasion was published, it became the talk of the town. everyone wondered, could this story be true? ralph said yes. and police wondered if the truth was in t...

Finally they had enough. almost nine months after pam's death, officers went to the antique store with an arrest warrant. >> that's when we learned that he decided to go on vacation. >> ralph candelario was gone. >> coming up, a manhunt for a suspected killer by cell phone. >> i initiated some phone calls with ralph so we could try to track him down. >> but would he answer? when "dateline extra" continues.