A 12-year-old Lethbridge, Alta., boy who “had been researching murder on YouTube” before he stabbed his seven-year-old brother nine times, pleaded guilty to attempted murder Wednesday afternoon.

A publication ban under the Youth Criminal Justice Act means neither of the brothers can be identified.

On Wednesday, the older brother pleaded guilty before Youth Court Justice Ryan Anderson in Lethbridge court. The 12-year-old, who appeared via video link, sobbed as the prosecution read aloud an agreed statement of facts.

Court heard that on Aug. 27, 2025, the two boys were home alone while their father was at a store.

The older brother “became enraged” with his younger brother “and had an urge to cause his brother harm,” according to the agreed statement of facts.

Lethbridge police charge 1

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