Johnson said Espada stared at her with an unreadable expression.
We found them, Espada said.
"I can't even explain the emotions we felt," Johnson said. "It was just unbelievable. It was surreal. The heaviness in the heart just lifted."
Castro, 52, was arrested quickly after that. He is in jail on charges of kidnapping and rape, and is accused of snatching the three women between 2002 to 2004, and holding them ever since.
His attorney has said he plans to plead not guilty.