A spokesperson for the Parole Board said: "We can confirm the parole review of Gary Hopkins has been referred to the Parole Board by the Secretary of State for Justice and is following standard processes.
"A panel will carefully examine a huge range of evidence, including details of the original crime, and any evidence of behaviour change, as well as explore the harm done and impact the crime has had on the victims.
"Parole Board decisions are solely focused on what risk a prisoner could represent to the public if released and whether that risk is manageable in the community.
"Evidence from witnesses such as probation officers, psychiatrists and psychologists, officials supervising the offender in prison as well as victim personal statements may be given at the hearing.
Themis, 28, then known as Gary Hopkins, sexually assaulted Leoni, tied her hands behind her back and left her in the water-filled ditch.
