The Lord Chamberlain's Daughter

Who murdered Hamlet's father? Hamlet decided the killer was his uncle Claudius. After all, as a result of the assassination, Claudius became Denmark's king. But did Hamlet get it right? And what about those other high-ranking persons, including Hamlet and Claudius, who ended up dead? Would Ophelia, the lord chamberlain's daughter Hamlet was in love with, know?(The Lord Chamberlain's Daughter does not require any familiarity with Shakespeare's Hamlet.)