An alleged case of incest led to 4 'senseless' deaths in 3 states. One was a baby.

An alleged case of incest led to 4 'senseless' deaths in 3 states. One was a baby.  Washington Post Steven Pladl, His Daughter Katie and Their Incest Baby Found Dead in Murder-Suicide  Newsweek Father, daughter who had child together dead in murder-suicide; child also found dead  WLS-TV Cops: Accused incest couple, their infant dead in apparent multi-state murder-suicide  CBS News Mom's 911 call: My son killed his baby and wife, who was also his daughter  News & ObserverFull coverage