506: Joe Hunter's Mission (from "48 Hours")

When Joanna Hunter died in her home in 2011, it took the cops less than 30 minutes to rule the death a suicide. Mostly because her husband said that that's what happened. No crime scene was preserved and no investigation was done. The case was closed, but Joanna's family never accepted the suicide ruling. They knew all too well about the years of abuse Joann…