<P> Until 1915, hanging was the common method of execution . 1915 saw the first use of the electric chair, even though it was approved by the Pennsylvania General Assembly in 1913 . The delay was due to the time needed to finish the Western Penitentiary in Centre County, now the State Correctional Institution--Rockview . On November 29, 1990, Governor Casey changed the form of execution to lethal injection . </P> <P> Since the re-instatement of the Death Penalty by the Supreme Court in 1976, 3 individuals, all convicted of murder, have been executed by the Commonwealth of Pennsylvania . All were executed by lethal injection, and in all three cases, they waived their appeals and asked that the execution be carried out . </P> <Table> <Tr> <Th> </Th> <Th> Executed person </Th> <Th> Date </Th> <Th> Victim (s) </Th> <Th> Governor </Th> </Tr> <Tr> <Td> </Td> <Td> Keith Zettlemoyer </Td> <Td> 2 May 1995 </Td> <Td> Charles DeVetsco . </Td> <Td> Tom Ridge </Td> </Tr> <Tr> <Td> </Td> <Td> Leon Moser </Td> <Td> 15 August 1995 </Td> <Td> Linda Moser, Donna Moser, and Joanne Moser . </Td> </Tr> <Tr> <Td> </Td> <Td> Gary M. Heidnik </Td> <Td> 6 July 1999 </Td> <Td> Deborah Dudley and Sandra Lindsay . </Td> </Tr> </Table> <Tr> <Th> </Th> <Th> Executed person </Th> <Th> Date </Th> <Th> Victim (s) </Th> <Th> Governor </Th> </Tr>

Who was the last person executed in pa