(CNN)-A former Marine sharpshooter who said he received messages from God broke into two homes outside Lakeland, Florida, early Sunday and fatally shot four people he didn't know -- including a 3-month-old baby -- and wounded an 11-year-old, according to a criminal affidavit.
"Keep Out" signs mark an entrance to the Murdaugh family property in Islandton, where authorities say Alex Murdaugh's wife and son were killed in June.
