Police interview Stephen Paddock's brother in search for motive for mass shooting

Investigators have met the brother of the Las Vegas gunman while friends and relatives of the 58 killed and other concert-goers returned to the scene to reclaim shoes, phones and bags left behind in the panic as they fled.

The interviews with Stephen Paddock's brother were part of an exhaustive search through the 64-year-old's life in search of clues about why he unleashed gunfire from broken windows in the 32rd floor of the Mandalay Bay hotel casino.