A 24-year-old woman accused of knifing a 65-year-old Boston lawyer to death on his houseboat before taking measures to dump his body out at sea found her protests drowned out in the courtroom during her arraignment Friday morning.Joseph Donohue suffered multiple stab wounds before police found him around 11 p.m. Sunday wrapped up on his vessel after his son asked for a wellness check at a marine in Charlestown, according to authorities.Suspect Nora Nelson, who appeared in court wearing white sweats and shackles, answered his door when officers arrived, Assistant District Attorney Rita Muse told the court during the hearing."When