Authorities said four police officers serving a warrant for a felon wanted for possessing a firearm were killed, and four other officers were wounded in a shootout on Monday at a North Carolina home. According to Charlotte-Mecklenburg Police Chief Johnny Jennings, a second shooter started firing at the police, injuring some as they raced to the area to save the first group of fallen officers. In a news conference, Jennings said that they had lost some heroes who were out simply trying to keep their community safe. The suburban Charlotte house was ripped apart following a three-hour firefight b…