A 15-year-old burglar has been sentenced to 65 years in prison (until age 80) because another burglar was shot and killed.

The principle applied here, that each participant in the crime is responsible for its consequences, seems valid to me up to a certain limited point — but I think this stretches it too far.

Imprisoning people beyond age 50 for ordinary violence is generally superfluous because the urge to violence dies away before that age.