Would this legal strategy work?

I saw this legal strategy on an episode of The Practice, I think - a man was on trial for killing his wife. He had his daughter confess and plea bargain herself, and he was acquitted. After that, leveraging double jeopardy, HE then confessed to the crime, getting his daughter acquitted, and neither could be tried again. Does double jeopardy apply to any form of conviction or just trial? Additionally, would the confessions be hearsay or admissible as evidence? Finally, would that count as reasonable doubt even if the jurors knew something was going on?