Caitlin got a phone call saying "I know your secret." When she overheard Ricardo telling AJ that there was plenty of evidence linking Cole to Hillary's disappearance, Gabi asked him about it, but he refused to tell her. Olivia told Cole that she thought that Hillary was dead long before last night. She also said that she wasn't going to turn him in, because she'd only hurt Caitlin by doing so. She promised not to turn him in to Ricardo or to try to turn Caitlin against him if he promised not to take Caitlin away with him. He agreed. Ricardo brought in the evidence that they found. He said that the blood on the clothes was Hillary's. (thetvdb.com)