MSNBC Dateline November 4, 2019 06:12:00
They're gone. what's the next thing you s remember? >> so reading, kind of hanging around. i think the first time i kind of noticed that it was getting a little late, it had gotten dark and, you know, nobody should be kind of hiking or walking around when it's dark. >> reporter: alex had no inkling of the tragedy unfolding at cottonwood creek. it started right after his dad took this picture of his mother, leslie. leslie and gracie posed here. you can see it's a stunning setting. but just about an arm's length behind me is a cliff. a steep dropoff to the granite below. and the icy cold waters ...