April 28, 2019 CBS News Sunday Morning : Season 41 Episode 32

This week "Sunday Morning," hosted by Jane Pauley, features Lee Cowan's cover story on PostSecret.com, where anonymous writers share their most private secrets with the world. Plus: Rita Braver investigates a series of mysterious deaths that were studied by author Harper Lee for a never-published book; Mo Rocca sits down with "Dynasty" actress Joan Collins; Ted Koppel visits the Broadway stage of "Network" to look at the state of TV news today; Faith Salie checks out a Brooklyn Museum exhibition of Frida Kahlo; and John Blackstone interviews Taylor Mac, playwright of the new Broadway comedy "Gary," starring Nathan Lane.