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Police say they do not expect to file charges against the girlfriend of a gunman who killed 58 people in Las Vegas in October.
Marilou Danley, girlfriend of gunman Stephen Paddock, had previously been named a person of interest in the case.
Sheriff Joe Lombardo told a news conference that police still do not know the motive for the mass shooting.
Paddock opened fire on hundreds of concertgoers from a 32nd floor window of the Mandalay Bay hotel.
It was the deadliest mass shooting in modern US history.
Sheriff Lombardo told reporters that they believed Paddock had acted alone. He said 851 people attending the music concert on Las Vegas Strip were injured, including 422 who had wounds associated with gunfire.
In a public update to the investigation on Friday, he said Paddock had searched for other potential targets and taken photographs of possible sites, the Associated Press reported.
Sheriff Lombardo said Paddock had also searched online for tactics used by police and Swat teams.
After the shooting, officers stormed the hotel room and found Paddock dead. He had smuggled 24 weapons and thousands of rounds of ammunition into the hotel, concealed in 10 suitcases.
This story is from The BBC News. To read the full story, please go to http://www.bbc.co.uk/news/world-us-canada-42754289.
