we would go to coffee shops. and we would go to parks. >> reporter: which is exactly what mollie and kristene decided to do on a warm summer night back in june of 2012. their destination, violet andrews park. >> that place seem safe to you? >> yeah, it did. >> all the parks did. >> we would go at night all the time. >> reporter: before heading out, the two called brittany, asking if she wanted to join them. brittany took a pass. >> they had asked me to go, but i had a vollyball game the next morning. so i wasn't able to. >> reporter: it was a decision that still haunts her. >> i just know -- because they, like -- you know, they called me that night. i'm like if i was there -- >> reporter: the next morning, chris and stan seymour were strolling through violet andrews park. >> we started looking around for birds in general. didn't see a thing. this place was as quiet as we'd ever seen it. >> reporter: and that's when, just below one of the overlooks, they made their terrible discovery.