The father of a Washington woman slaughtered along with her new husband - allegedly at the hands of a convicted Bay State killer - said his daughter’s accused murderer never should have been released from prison here. “It’s because of stupidity in Massachusetts that my daughter is dead,” said Darrel Slater, 55, who is preparing to bury his daughter, Beverly Mauck, 28, and her husband Brian Mauck, 30. The couple was executed in their home in rural Graham, Wash., Saturday after an alleged argument with Daniel Tavares Jr., 41, who in 1991 pleaded guilty to hacking his mother to death...