Carlo Gesualdo
A lot of people heard about the murders.  Famous poets such as Tasso wrote poems about it.  Nothing was done to arrest Gesualdo, however.  Some people at the time said that he also murdered one of Maria’s babies because he thought he might not have been the father.  Other people even said that he murdered his father-in-law when he came wanting to kill him in revenge, but we do not know whether this was true.