The girlfriend of the Las Vegas gunman is set to be interviewed by authorities.
Marilou Danley wasn't in the United States when her partner Stephen Paddock opened fire on a Las Vegas crowd, killing nearly 60 people.
It's been revealed Paddock placed cameras around his motel room so he could watch for police during his killing spree.
US correspondent Rebecca Wright told Rachel Smalley Paddock's partner will be questioned.
"They will be speaking to her extensively, trying to get inside the mind of Stephen Paddock and understand what was going on in the days, the weeks, the months leading up to his attack."
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