Why did the boy spend time in a juvenile facility in twelve angry men?

In "Twelve Angry Men," the boy spent time in a juvenile facility because he was accused of murdering his father. His troubled background, including a history of violence and a difficult home life, contributed to the perception of him as a likely offender. The jurors initially view his past as indicative of his guilt, but as the deliberations progress, they begin to reconsider the evidence and the boy's circumstances.