Just for reference, here is what Tammy stated in one CNN interview regarding her actions when she arrived at the lake:
SBM
"We pulled into Meyers Lake, right about where Jim and I are standing. And I got up and just jumped out and started asking random people, Have you seen two little girls, one on a mountain bike, you know, gave the complete descriptions of them. And a man -- they have his name. I don`t know who he is. He said to me, Yes, I seen two little girls going west on the bike trail."
http://transcripts.cnn.com/TRANSCRIPTS/1207/19/ng.01.html
Here is another transcript of her describing what happened:
We stop at Meyers Lake. I said, "Mom, drive me to Meyer Lake." I had Elizabeth`s older brother who`s 12, Kelly (ph), with us. And I just jumped out and started asking random strangers, "Have you seen two little girls?" Gave them the description, the colors of the bikes, and possibly what they were wearing.
And one man stepped forward and said, "Yes, I seen them going east on the bike trail at about 2:30." Now, whether he`s telling the truth or not, they do have this man`s name. You know, I don`t know. Whether he`s a person of interest, I don`t know.
SBM
And I want to go back to Tammy Brousseau. You`re the aunt of the missing girls. You said that you went two the area where they ultimately found the bikes. Did you see the bikes? Did you find them?
BROUSSEAU: I did not find them. As I was saying, a man, who I approached and started asking questions, said he had seen the girls going east on the bike trail. It`s a small lake. It wraps around on the south side of the lake.
And a little further down in the same transcript:
TAMMY RUSSO, AUNT OF MISSING GIRLS: Absolutely not. There was nothing that seemed terribly out of the ordinary. There was a little boy fishing, and he had been there a long time. I asked him as well, when I first approached and started asking random people. I said, "Did you see two little girls on a bicycle? He said "No". I said, "How long have you been here?" He said, "A long time."
So when I told you a man said that he had seen them going east on the bike trial, whether that was true or not, yes, they have his name, they know who he is. But it appears what he said was true because like I said the lake wraps around and the bikes were found on the south side. And that`s where the girls --
http://edition.cnn.com/TRANSCRIPTS/1207/16/ijvm.01.html