The International Labor Organization believes that there are 4.5 million people currently trapped in sexual slavery due to human trafficking.

Thanks to flight attendant Shelia Fedrick, there is one less human trafficker roaming the world and one less person being trafficked.

Working an Alaska Airlines flight from Seattle to San Francisco, Fedrick noticed a girl of about 14 or 15 traveling with an older gentleman. She found the pairing strange as she said, “he was well-dressed…and she was looking all disheveled and out of sorts.”

Wanting to make sure the girl wasn’t being held against her will, Fedrick tried to engage the pair in casual conversation; the man immediately became defensive and closed off.

Feeling increasingly uneasy, Fedrick says she “left a note in one of the bathrooms.” The girl “wrote back on the note and said, ‘I need help.’”

That was all Fedrick needed to know. She sprung into action, surreptitiously working with the flight’s pilot to have police waiting for the man when they landed. He was arrested, and the girl was taken to get help.

Though happy she could help, the success weighs on Fedrick; she feels that this wasn’t the first human trafficking survivor to have been on one of her planes, “I could have seen these young girls and young boys and didn’t even know.”

In 2016, U.S. Immigration and Customs Enforcement arrested 2,000 human traffickers and saved 400 survivors according to NBC. To ensure no trafficker escapes the notice of the authorities, flight attendants have been receiving training so that more attendants can take the life-saving actions that Fedrick did.

The organization leading the charge is called Airline Ambassadors International; ahead of the Super Bowl, the group taught 100 flight attendants to look for signs of trafficking and gave them a variety of tools to neutralize it.

To find out more about how you can help the efforts of heroes like Shelia Fedrick, you can visit Airline Ambassadors International here.