Investigators are combing through the mansion of a prominent Boston-area real estate attorney and developer after he and his wife were found shot to death in their home, the victims of an apparent double homicide. John Magee, 69, and Geraldine Magee, 67, were found dead at about 9:15 am on Wednesday, having been gunned down on the first floor of their sprawling estate in the affluent community of Andover, Mass. They were discovered by their daughter. The front door of the couple's home was found unlocked with the family dog still inside, according to police, and the couple's Lexus SUV was found torched 25 miles away, in Boston's North End, in an area that has come to be known for organized crime activity. Police are still searching it for clues while reassuring residents that there is no cause for fear. It was the first muder in the community in more than a decade. "The incident appears to be an isolated act. And the circumstances lead us to believe that there is no further threat to the Andover community," Andover Police Chief Brian Pattullo said, adding, "I don't want to give out any specifics that may compromise our investigation." Investigators will not say whether there were signs of a robbery or a struggle in the home. Police did say, however, that there was no history of trouble at the Magee residence. By Wednesday night, authorities said they had not identified any suspects and have yet to establish a motive.