A large manhunt is underway in Nassau County, Florida, for a man accused of shooting and killing a law enforcement officer — and the county sheriff is telling armed citizens to open fire on the suspect should he target their homes. What are the details? On Saturday, Nassau County Sheriff Bill Leeper instructed those members of the public who have guns to use them to "blow [Patrick McDowell] out the door" of their homes. McDowell, 35, is wanted for allegedly shooting sheriff's deputy Joshua Moyers during a traffic stop on Friday. According to the Florida Times-Union, McDowell shot Moyers once...