en_tn/luk/23/19.md

Barabbas was a man ... for murder

This is background information that Luke gives about who Barabbas was. (See: rc://en/ta/man/jit/writing-background)

who had been put into prison

This can be stated in active form. Alternate translation: "whom the Romans had put in prison" (See: rc://en/ta/man/jit/figs-activepassive)

a certain rebellion in the city

"trying to persuade the people of the city to rebel against the Roman government"