<Table> <Tr> <Th_colspan="2"> Chicago Tylenol Killings </Th> </Tr> <Tr> <Th> Location </Th> <Td> Chicago metropolitan area, United States </Td> </Tr> <Tr> <Th> Date </Th> <Td> September 29 / 30, 1982 </Td> </Tr> <Tr> <Th> Target </Th> <Td> Tylenol consumers </Td> </Tr> <Tr> <Th> Attack type </Th> <Td> Poisoning, mass murder </Td> </Tr> <Tr> <Th> Weapons </Th> <Td> Cyanide poison </Td> </Tr> <Tr> <Th> Deaths </Th> <Td> 7 </Td> </Tr> <Tr> <Th> Perpetrator </Th> <Td> Unknown </Td> </Tr> <Tr> <Th> Motive </Th> <Td> Unknown </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Chicago Tylenol Killings </Th> </Tr> <Tr> <Th> Location </Th> <Td> Chicago metropolitan area, United States </Td> </Tr> <Tr> <Th> Date </Th> <Td> September 29 / 30, 1982 </Td> </Tr>

Why was johnson and johnson not held responsible in the cyanide tainted tylenol case