It’s heartbreaking. An 85-year-old woman tells a police officer, “I have the bank on the phone. I’m in danger.”

It’s not the bank on the phone. It’s a scammer. Thankfully, a good samaritan saw what was happening and called the police.

AARP estimates there are more than 45,000 Bitcoin ATMs across the country. They're increasingly becoming a tool of the sophisticated criminal networks of the scam industry.

ABC News investigates the cash-to-crypto machines popular with scammers, routing hundreds of millions of dollars from victims to transnational criminal organizations each year.