This is the moment murderer William Campbell confessed to stabbing his brother in a rage.
Body worn footage shows Campbell being arrested in his mum's house for the attack in the back garden.
Campbell was arrested for wounding with intent at that point as medics fought to save Samuel's life, to no avail.
The killer told the police "I stabbed him out of rage" and added "I'm sorry".
The 26-year-old is facing a life sentence after jurors convicted him of murdering his 24-year-old sibling in Silksworth, Sunderland, in June.
The court the brothers, described as "chalk and cheese" by their own heartbroken mum, clashed over a dog while drunk.
As mum, Carolyn, tried to get between them as they scuffled, William plunged a knife into Samuel's chest.
Campbell , of Allen Court, Stokesley, North Yorkshire, who has recently been diagnosed with autism, will be sentenced on January 5, when he will find out what the minimum term he must serve before he has a chance of release from the life sentence will be.
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