March 12, 1979 Houston, Texas Jeffery Lee Griffin (24) kills 19-year-old David Sobotik and 7-year-old Horacio DeLeon during a robbery Sobotik was a convenience store manager and his friend DeLeon would often help out around the shop. Griffin attacked both Sobotik and DeLeon during a robbery, stabbing both in and around their hearts 9 times.…