Finally found it.... this is where Grandma says the dad (Drew) came home.
COOK: Well, I took her from my house -- I live in Waterloo, and her mom left for work. She rode with me to Heather`s house, my other daughter in Evansdale. And I go there every day for four or five hours, and she always goes with me. And because Heather is not well and she has four little kids. And we did a daily routine that day at, you know, in her house doing things, eating breakfast and all that stuff.
And so it was at 11:30, they asked me if they could go for a short bike ride, and I said yes. And they`ve done this millions of times. And they`ve never, never went that far. I could go outside and yell their names, and they would eventually hear me.
And this day, they just didn`t come back. And so _______), Elizabeth`s brother, he`s 12 --
I hopped in my car because the dad came home, and I went searching Elk Run. We were down by Meyers Lake. We drove all over every little park and Evansdale, Elk Run, every mentionable place, downtown area. And we couldn`t find nobody.
http://transcripts.cnn.com/TRANSCRIPTS/1207/17/ng.01.html