BREAKING NEWS: An off-duty Nassau County police officer was killed in a crash this morning near the Smith Haven Mall in Lake Grove. A statement from Nassau County Executive Bruce Blakeman identified the officer and expressed his condolences. Stay with News 12 for more on this breaking story. . . . #News12 #BreakingNews #LongIsland #Crash #LakeGrove #SmithHavenMall #Police #LocalNews #News