In a case considered the deadliest in Grapevine’s history, seven people were found killed on Christmas in an apartment on the 2500 block of Hall Johnson Road. Friends say Aziz Yazdanpanah, 56, likely showed up unexpectedly. Police say he murdered his family while wearing a Santa Claus suit. Pictured is victim Sahra Zarei, 22. She was the shooter's niece.