A Massachusetts police officer described as a “great family man and officer” died Sunday after a man attacked him with a rock, then took the cop's gun and shot him in the head and chest, officials said. Weymouth police officer Michael Chesna, 42, was killed after he sustained "life threatening" injuries in the shooting just before 8 a.m., officials. Another woman in her home was also shot and killed when the suspect, Emmanuel Lopes, fired the gun three more times while escaping responding officers. “Officer Chesna was an army veteran. In fact, I was speaking with his mom this morning...