David Thorne has spent over 20 years in prison for a murder he says he did not commit. Although he says his case is "Dead in the Water", he hasn't been alone. Sue Thorne, a retired postal worker turned amatuer investigator, has kept his case alive all these years and uncovered new evidence that could point to David's innocence. Do you have information about who murdered Yvonne Layne? Call our anonymous tip line at 888-863-9550. All tips are anonymous and confidential. This Week's Sponsors: Apostrophe - Go to apostrophe.com/MIA and use code MIA to save $15 off your first visit. EmbrWave - Visit embrwave.com/MIA to save $50 Stamps.com - Go to stamps.com and use promo code UNJUST to get a special offer including a 4 week trial plus free postage and a digital scale - no long term commitments or contracts.