What Kerry Sanders had heard, prior to the rescue. From earlier today on MSNBC/CNBC:

The information about an American POW still being alive is information that
had been flowing to the US Marines here on almost a daily basis. Even
yesterday, somebody came up to me and said, `You’re a journalist, you need
to know there’s an American soldier who’s being held in the hospital. She’s
being tortured. Please make sure that the people who are in charge of the US
military know that she’s alive.’