Can Alexa help solve a murder? Police think so -- but Amazon won't give up her data

When police responded to a home in Bentonville, Ark., one Sunday morning last November, they discovered Victor Collins's dead body in the backyard, floating face up in a hot tub. Police records describe a grim scene: Collins's left eye and lips were dark and swollen, and blood and pink foam appeared to be coming out of his nose. The water inside the spa had turned a dark reddish hue, seemingly discolored by blood, feces and vomit. The resident who had called 911, James A. Bates, told police that he and a few work buddies, including Collins, had stayed up the night before watching football and drinking. Bates agreed to let two of them crash at his house, he told police, then went to bed.