I am somewhat surprised that this good woman turned the wallet into the police.
I am very surprised that the police did not simply seize the contents because, you know, Drugs.
If you find something, hold on to it and find the rightful owner yourself.
Years ago I found some very valuable jewelry in the ladies room of the Ritz Carleton. I turned it in at the front desk. A few days later I called to see if the rightful owner had been found. No way. They had no record that it had ever been turned in.
Two people were wronged - the rightful owner the person who found the jewelry and the finder who should have held onto it until making sure it got into the rightful owners hands.