Tyler Sivier

Introduction

Tyler Sivier is a young Scottish man who pleaded guilty to assault to severe injury after a street altercation in which a man was struck in the abdomen with a knife, leaving him permanently disfigured and in danger of his life. Sentencing him on 15 September 2026, Lord Braid described the assault as “a most serious assault” and rejected any suggestion that the victim’s willingness to take part in an initial fight excused the use of a blade, noting that had the victim not undergone emergency surgery he “may well have died.” Sivier was detained for three years and nine months under the sentencing guideline for young people, with a supervised release order to follow his release .

Background Information

The case, HMA v Tyler Sivier and MM, was heard alongside that of a co-accused identified in the published sentencing statement only by the initials MM, whose identity the court did not make public. The altercation arose from an incident involving a car in the previous month. Minutes before the stabbing, MM struck the complainer on the head with a metal tray; the complainer then followed Sivier’s group and challenged them to a fight, and — on the evidence led at trial — only Sivier took up the challenge. By his plea of guilty, Sivier accepted criminal responsibility for the assault with the knife whether or not he was the person who actually inflicted the blow .

The Controversy or Incident That Led to Their Cancellation

Admitted a knife assault to severe injury, permanent disfigurement and danger of life in a street fight; detained for three years and nine months.

The victim was struck in the abdomen with a knife during the fight and came so close to death that emergency surgery was required to save him. In his victim statement he described the assault’s lasting psychological impact. Lord Braid accepted that the complainer appeared to have been a willing participant in the initial fight, but told Sivier that this was “no excuse for the use of a knife,” and that the offence was made worse because it endangered the complainer’s life .

At the trial of the co-accused, the jury found MM did not bear criminal responsibility for the knife assault a short time after the tray attack, and for the tray assault itself — which caused no injury — MM received a community payback order with a twelve-month supervision requirement, the court agreeing with a social work report that MM posed “a clear risk of further offending” unless the behaviour was addressed. Sivier, by contrast, had pleaded guilty at a late stage to the most serious charge on the indictment .

Lord Braid selected a headline sentence of four years’ detention, reduced for the plea — although a late one — to three years and nine months. He noted that a considerably longer sentence would have been appropriate had Sivier been an adult, and that the sentence would run consecutively to unrelated offending for which Sivier was to be sentenced later the same day .

Public Reaction and Consequences

The sentencing statement records the court’s assessment that Sivier — despite the gravity of the offence — showed some prospect of rehabilitation, with “a clear need for work to be done” to stop him reoffending and “some hope” of success. The detention outcome followed the Scottish guideline on sentencing young people, which places rehabilitation at the centre for offenders under twenty-five. The court also imposed a supervised release order: for twelve months after his release Sivier will be under social worker supervision, and a proved breach can return him to custody .

Current Status

Sivier is serving three years and nine months’ detention, backdated to 27 July 2026, to be followed on release by a twelve-month supervised release order. The sentence is consecutive to whatever term was imposed the same day for his unrelated offending, the details of which are not part of the published statement. The victim, who required emergency surgery and lives with the attack’s psychological aftermath, is not named in the published remarks .

Impact on Their Career/Life

Sivier enters custody as a convicted knife offender at an age when the court expressly contemplated rehabilitation, but the conviction — a plea to an assault that nearly killed a man and left him permanently disfigured — will remain on his record for life. The sentencing statement’s account, published in full by the Judiciary of Scotland, fixes the narrative permanently: a challenge to a fight accepted by one young man, and a knife that turned a fist fight into a near-fatal wounding .

Sources

• “HMA v Tyler Sivier and MM” — Judiciary of Scotland sentencing statement, 15 September 2026: source