Colon Cancer Game Changer? | Fencer Lauren Scruggs Makes History | Zooey Deschanel on "Harold and the Purple Crayon" | Jay Ellis Talks New Book

Christopher Dunn has been in prison for 33 years for murder. Last week, a St. Louis judge overturned his conviction and ordered his release. However, the Missouri attorney general filed a notice of appeal with the state Supreme Court and told the prison to keep Dunn in jail while the legal battle plays out.The FDA has approved a new blood test that could change the way we detect colon cancer, which is the second most common cause of cancer-related deaths in U.S. adults. CBS News chief medical correspondent Dr. Jon LaPook explains.CBS Saturday Morning co-host Dana Jacobson catches up with Lauren Scruggs at Team USA House in Paris to discuss her historic achievement and its impact on young athletes.Actor Jay Ellis, famous for his performances in "Insecure" and "Top Gun: Maverick," joins "CBS Mornings" to talk about his new book, "Did Everyone Have an Imaginary Friend (or Just Me)?: Adventures in Boyhood."Award-winning actor Zooey Deschanel takes on a colorful role in "Harold and the Purple Crayon," where she stars alongside Zachary Levi. The film adapts the classic children's story, bringing its magical elements to the big screen.Melissa Walker and nine-time Grammy winner Christian McBride share their passion for music with "Jazz House Kids," a nonprofit that has produced top jazz musicians and provided free instruments and education to thousands of young artists.