Prison tutor guilty of misconduct in a public office
Maths tutor Oksana Antanaitiene admitted forming an inappropriate relationship with an inmate at HMP Chelmsford
Last updated 23rd Sep 2026
A prison tutor who formed an inappropriate relationship with an inmate at HMP Chelmsford has admitted misconduct in a public office.
Oksana Antanaitiene, a maths tutor, was found in a locked office with a serving male prisoner in August 2025.
An investigation found she had communicated sexually with the man by letter, by phone and had sent sexually explicit images.
She had undergone two separate training sessions relating to safety in prison, corruption prevention and delivering teaching within a prison context.
The inmate’s cell was searched on 22 October 2025. During that, explicit images of a woman were found. A USB device was also located in a dressing gown.
During an internal meeting a day later, Antanaitiene admitted forming the inappropriate relationship and had sent photos to the inmate.
She also admitted giving music and TV files to him which were contained within a USB drive.
During searches of a vehicle and a property connected to Antanaitiene, officers found other items of significance.
Antanaitiene, 51, of Bradleigh Avenue, Grays, was charged with misconduct in a public office in July 2026.
She appeared at Chelmsford Crown Court on 22 September, and admitted the offence. She was released on bail ahead of a sentencing hearing at the same court on 28 October.
DC Matthew Parker said: “Antanaitiene held a position of trust within the prison environment and was fully aware of the professional standards and boundaries expected of her.
"Instead, she chose to enter into an inappropriate relationship with a serving prisoner and continued that relationship through repeated contact and the sharing of prohibited items and explicit material.
"Her actions undermined the integrity of the prison system and had the potential to compromise the safety and security of the establishment.”