A coroner's inquest has heard that double murderer Paul Tainui is now used as a case study for certain types of psychopathy for Corrections staff training.
Tainui raped and murdered Nicole Tuxford in Christchurch, after breaking into her home and lying in wait for her in 2018.
He murdered his ex-partner Kimberley Schroder on the West Coast in 1994 in similar circumstances.
A joint inquest has been held into the murder of Nicole Tuxford and the suspected suicide of Kimberley Schroder's father Gary, who died after hearing Tainui had killed again.
Rachel Graham has been at the inquest
