A teenager has been found not guilty of murdering his grandmother after stabbing her at her home.

Pietro Addis, 19, was acquitted of murdering Brighton businesswoman Sue Addis in January 2021 after finding that he had diminished responsibility.

Mrs Addis, 69, was found dead in her home in Cedar Gardens in Brighton after being stabbed 17 times. Her grandson admitted killing her and had previously pleaded guilty to manslaughter.

The court previously heard from psychiatrist Dr Peter Misch who gave evidence that Addis had suffered a “brief, transient paranoid psychosis” at the time of the killing.

Addis is said to have suffered from the “delusional belief” that his grandmother wanted to kill him.

A post-mortem report found that Mrs Addis had died due to multiple stab wounds to the neck and chest.

Mrs Addis was a popular restaurateur in Brighton and Hove who ran Donatello in The Lanes and Pinocchio in New Road.

Earlier in the trial, she was described as a “a warm and generous person who was very supportive of her family” and who “spoke about her family with affection”.

Mrs Addis was also known for her charity work including with Martlets hospice and the Rocking horse children's charity.

The jury at Lewes Crown Court returned their verdict after around six hours of deliberations.

Following the verdict, Judge Christine Laing KC described the incident as a "deeply sad and distressing case without a shadow of a doubt".

Addis was remanded in custody ahead of a sentencing hearing for manslaughter which has been set for May 5.