My mom found a wallet near a bus stop many years ago and got in touch with the woman who owned it. You could see the wallet was rifled through.
The owner showed up and she went through her wallet and said everything was there (IDs credit cards kid’s pictures) except for the cash
She went on to accuse my mother of stealing the money out of the wallet! She walked away giving mom the stink-eye.
No good deed goes unpunished, lol.
Happened to me too. One of my employees (a 20-something)found a wallet on the ground in San Francisco. She gave it to me. It had no cash but ID (including a military ID) and a credit card. This was pre-Internet. I spent time calling people with the same last name (fortunately, not a really common last name) in local phone books. I located his brother. He acted like I had stolen the money. My husband has found several wallets over the last 20 years on his morning walk. We took them to the police department and let them deal with it.