Pennell was found guilty in the deaths of the first two victims on November 29, 1989, and plead no contest to the murder of two others on October 30, 1991.
Pennell when he executed for his crimes in 1992.
Pennell was the chief suspect in the murder of a fifth woman, whose body was found so decomposed that the police could not retrieve any evidence.
But when they didn't find as much money as they had hoped, they went upstairs for more, where they found Mrs Hawke-Petit, 48, and daughters Hayley, seventeen, and Michaela, eleven.
His modus operandi varied in every murder which through the police off track.
Pennell was strapped down on a vinyl-covered gurney.
He has not returned to his medical practice since the murders, stating his desire to be active in the foundations set up to honor the memory of his deceased family Perpetrators Steven J.
Hayes' lawyers had argued that he should be spared execution because the ringleader was Komisarjevsky who escalated the violence instead of carrying out a house robbery as originally planned.