 Complete coverage of the Brooklyn-Day Mass shooting on our website at WBAL.com. The shooting death of a three-year-old under investigation in Howard County tonight. It happened last night in Columbia. Police say there was an unsecured gun in the home on Harper's Farm Road. The child's parents and a five-year-old brother were at the home at the time. Police are still determining if the gunshot was self-inflicted or fired by someone else. Authorities say they don't see any indications of foul play and no charges have been filed in the case at this time.