Rachel Castillo found the bag sitting on a bench at the Miami Beach Golf Course on January 30.
"Easy money is not good money, you know?" Castillo told WSVN. "I was really freaking out a little bit."
With the cash was ownership information: the bag belonged to a 76-year-old man.
While the address in the bag was no longer correct, authorities managed to track down the man at an assisted living facility and confirmed it belonged to him.
"Well, he is in an assisted living facility right now. He might have a medical condition. That's undetermined. We are in touch with the family members getting more information, but we have identified that money as his through different transactions that he made. But it's nice that there's people out there...$36,000 is what a lot of people make a year," Miami Beach Police Sgt. Bobby Hernandez told WSVN.
The man will get it all back.
Miami Beach Police praised Castillo for doing the right thing and turning in the money.
Castillo, who admitted to WSVN that the money was practically the equivalent to one year's pay, said that she never considered keeping the money:
"I'm a Christian, and the Bible says, 'Do not steal, do not lie,' you know, all these things, and if you do what's right, if you live the right way, you'll be taken care of. I believe I'll be taken care of...if you do what's right."