More charges are filed for three Four State robbery suspects. 23-year old Maria Salazar, her brother, 25-year old Juan Salazar and his girl friend, 28-year old Brandee Larabee have each received an additional count of first degree robbery. The additional charges stem from a robbery at Hall`s Food Mart in Joplin on December 12th. The three have already been charged with two counts each of first-degree armed robbery. The three are suspected in a rash of convenience store robberies in December. More charges could come as police continue their investigation of other robberies in Joplin.