Aino Nykopp-Koski (born November 1950) is a Finnish serial killer.
She worked as a nurse and was found guilty of killing five patients and the attempted murder of five more.
During the mental health assessment, psychiatrists found out that Nykopp-Koski is psychopathic and has an antisocial personality disorder, but she was deemed culpable for her actions.
[3] Supreme Court of Finland dismissed her leave to appeal in November 2012.
Myllgren had requested to be paroled in March 2021, when she would have served the legal minimum of 12 years.