Please answer the following question: Question: Who shots Maddox? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Fortress Context: In a dystopian 2017, ex-army officer John Henry Brennick and his wife Karen are attempting to cross the CanadaUnited States border to Vancouver to have a second child. Strict one-child policies forbid a second pregnancy, even after their firstborn has died, so Karen wears a magnetic vest to trick the security scanners. A guard notices and raises the alarm. Brennick is caught, believing Karen to have escaped, and sentenced to 31 years at the Fortress, a private maximum security prison run by the Men-Tel Corporation. To maintain discipline all inmates are implanted with "Intestinators" which induce severe pain or death as a form of physical control and mental conditioning. The prison is co-run by Director Poe, who oversees Zed-10, a computer that monitors day-to-day activities. The prison is located underground, in the middle of the desert, inside a deep pit that can only be crossed by a retractable bridge, while the prisoners are kept in overcrowded cells secured by laser walls. John is imprisoned with inmates Abraham, a model prisoner who works as Poe's manservant and is awaiting parole; D-Day, a machine and demolitions expert; Nino Gomez and Stiggs, who tries to extort John. John learns his wife has been captured and is held in another level with his unborn child who, being illegal, is now officially owned by Men-Tel and will be confiscated at birth. Stiggs has a friend, Maddox, who intimidates John and the two are involved in a brawl which culminates with Maddox being shot by a security turret. John manages to grab Maddox's Intestinator and gives it to D-Day before he is taken away to be subjected to a mind-wipe procedure as punishment. Poe, infatuated with Karen, tells her that if she lives with him he will treat John well and release him from the mind-wipe chamber. She accepts to help John. Poe is revealed to be a cyborg, powerfully enhanced by Men-Tel cybernetics. Four months later, a heavily pregnant Karen manages to use her access to the prison computer in Poe's quarters to help John by restoring...
Answer:
security turret.