A transgender prisoner serving life inside Woodhill Jail has committed suicide in her cell.
Joanne Latham was discovered hanged behind a barricaded door at the all-male prison on Friday morning.
They attempted to resuscitate her, but she was pronounced dead at 6.20am.
Ms Latham was thrice sentenced to life in prison for attempted murder.
In 2001 the 38-year-old was jailed for slipping mercury from a thermometer into a roommate’s drink.
Six years later she was convicted for the attempted murder of a fellow prisoner in HMP Frankland.
Then in 2011, she was once again found guilty of the attempted murder of a patient at the Rampton Secure Hospital in Nottingham.
Today the Ministry of Justice said an investigation into Ms Latham’s death has been launched by the independent Prisons and Probation Ombudsman.