Bennett was found unresponsive at his home on 24 May.
Reed's case was ongoing when she was found unresponsive in her cell on 11 January.
He was found unresponsive at the scene but revived by emergency medical technicians.
Vicky Thompson, 21, was found unresponsive in Leeds Prison in Armley, West Yorkshire, on Friday night.
Former medical student Philip Markoff, 24, was found unresponsive in his cell yesterday morning in the Nashua Street Jail.
The certificate describes the circumstances of death: "Decedent was found unresponsive in his cell while in custody".
The man, Dale Hausner, 33, was found unresponsive in his jail cell Monday, Sheriff Joe Arpaio of Maricopa County said.
The certificate, filled by an United States Army pathologist, said, "Decedent was found unresponsive in his cell while in custody".
Luczak, 29, was found unresponsive in her cell at HMP Foston Hall in Derby at about 7.15am on Tuesday.
Her case was ongoing when she was found unresponsive in her cell at Holloway prison on 11 January.
She had been found unresponsive in her bathtub in Atlanta, and moved to hospice care in late June.
