>> we stayed together in the same room, the whole night. >> and did your dad sleep at all? >> it was a very long night. >> that they had no idea it was just the first sleep in this night of what would become the longest ordeal of their lives. coming up... >> we started taking photos. she took a few of me. i took some of her. >> fred gives investigators a detailed account of what happened to leslie. >> it looked to me like she just did a swan dive... and lands on the rocks, right by the water. >> and he's very clear on who was to blame. >> it was that damn dog tangled up in her legs--it--its what i think it was. >> what would police think of that? when "dateline" continues. s. . if you have symptoms of covid-19, even if they're mild, don't wait, get tested quickly. if you test positive and are at high risk for severe disease act fast-