ABERDEEN, Maryland— Four people are dead, including the suspect, in a mass shooting at a Rite Aid distribution center Thursday morning in Aberdeen. Three others were injured. Police say the gun used in the attack, a 9-mm Glock handgun, was registered to the suspect. Harford County Sheriff Jeff Gahler told reporters no shots were fired by law enforcement. It’s the third mass shooting in as many years in Harford County.