Three decades after a U.S. child disappeared, an arrest has finally been made. Etan Patz was 6 years old when he went missing and now a man has confessed to killing him. Tonight, meet a man whose daughter was abducted in a similar case, and was later found murdered. He explains what it's like to wait for any clue of your missing child.

And, when Ottawa resident Helene Campbell learned she was suffering from a degenerative hardening of her lungs, she became famous as an advocate for organ donation, using social media to send her message out. She finally underwent her own double lung transplant last month and today we got to see the extent of her remarkable recovery for the first time. Mark talks with a Starbucks barista who saved the life of a customer by donating her kidneys.

Plus, Facebook's initial public offering of stock was supposed to be a shining moment, but a week after it launched the share price dropped almost 15%. Investors are furious, complaining the IPO wasn't just bust, it was also botched, and may have even broken the rules. Financial fraud lawyer Jonathan Levine has launched a class-action lawsuit against Facebook on behalf of investors and he weighs in on how he says the company's regular investors were left out of some key information.

Tune in tonight at 8 p.m. ET on CBC News Network.