A boy who stabbed his mum 118 times before calling Police and asking them to bring a body-bag, has stated that he did not remember the incident until he arrived in Police station.

Rowan Thompson was visiting his mother Joanna Thompson and the pair had just returned for a morning jog when the 17 year old attacked her in her village home.

Mrs Thompson, 50, was strangled to unconsciousness in their living room by Thompson and ’10 or 15 minutes later’ he returned to brutally stab her 38 times to the forehead, 64 times to the neck, and 16 times to the arm.

The police officer who arrested Thompson at the home in Hambledon, Hampshire, said the teenager was ‘extremely calm and composed’ and ‘seemed to be more concerned about his cat’.

In October, Thompson was found dead aged 18 while in custody at a secure mental health facility – just four days before he was due to stand trial accused of murdering his mother.

It was heard Thompson and his mother had ‘stressful’ conversations about his living arrangements on the night before her death and he felt she was ‘controlling and over-bearing’.

Thompson, who became gender-less and changed his name from Ben, had previously been admitted to mental health hospitals following a suicide attempt and suffered depressive bouts.

He told police he felt ‘strange’ while returning from jogging with his mother, was on ‘auto-pilot’, and ‘could not remember anything’ until he arrived at the police station.