You're at a lost and found at a park where you can wade in a river. The river flows west.
You have a wallet. One person claims he was watching the sunset, but then it dropped, and he didn't see it floating in the river because it flowed the other way.
As he's about to take it, one other person claims it was his. He was wading with his kids in the evening, dropped his wallet, and wasn't able to catch it because the sun was in his eyes.
While the first two fight, another person claims it's his. He says he was wading with his girlfriend, dropped it, and didn't notice because he was kissing her .

After some thought, you give it to one of the three people.

Which one do you give it to?