Only 9 months in jail for convicted felon

How does someone who is a documented gang member, convicted felon for domestic violence, on parole, only get 9 months in jail for being in possession of a firearm with a 31 round magazine?? That someone was Larry Woodruffe and he allegedly murdered 7 yr old Jazmine Barnes in cold blood.

Our officers are catching these dirtbags and putting them in jail, time for the rest of the Criminal Justice System to do their job! #BrokenSystem