Investigators see Marilou Danley, who says she voluntarily returned to the U.S. after recent travel in Asia, as key to understanding the motives behind one of the deadliest mass shootings in U.S. history.
Wall Street Journal: Girlfriend of Las Vegas shooter says she was unaware of attack plans
Las Vegas residents Elisabeth Apcar and Dashenka Giraldo light candles at a the makeshift memorial at the northern end of the Last Vegas Strip, Oct. 4, in Las Vegas, Nevada.
