The shooting happened in a manager’s office on an upper level of a Stop & Shop grocery in the community of West Hempstead, New York. A couple hundred people were inside the store, police said.Gabriel DeWitt Wilson is someone “we believe is the shooter,” Nassau County Police Commissioner Patrick Ryder said before Wilson was taken into custody.”He left the scene, and he was witnessed still carrying the handgun,” Ryder told reporters.The shooting killed a store manager, a Nassau County official