Michael Dee Mattison, 55, received on death row from Los Angeles County on April 14, 1980, died of natural causes at an outside hospital facility on July 17, 2009.
Fred Harlan Freeman, 69, received on death row from Alameda County on October 7, 1987, died of natural causes at a community hospital on July 25, 2009.
Miguel Angel Martinez, 39, received on death row from Los Angeles County on December 28, 1998, died of natural causes at a community hospital on July 26, 2009.
David Arisman, 61, received on death row from Los Angeles County on January 27, 1999, died of natural causes at the California Medical Facility Hospice Unit on September 5, 2009.