The Marion County Sheriff’s Office is expanding a free gun lock program following three recent tragic shootings involving children and unsecured guns in Indiana. Marion County Sheriff John Layton said gun locks are one of the easiest ways to prevent shooting tragedies. The sheriff's department has ordered nearly 2,800 new gun locks after handing out 800 locks since the beginning of the year. Beginning Wednesday, they will be available for free at Don's Guns on the northwest side of Indianapolis and at Beech Grove Firearms Inc. on the southeast side. Marion County sheriff’s deputies will also have locks available in their cars.