Judge Dredd

In the future, the Earth has become a deadly wasteland called the Cursed Earth. The few survivors live in overcrowded "Mega-Cities" plagued by rampant crime. To combat this, a new order of law enforcement has emerged: Judges, officers who act as police, jury, and executioner.
In 2139, in Mega-City One, a crime epidemic threatens to overwhelm the Judges' dwindling resources. The strict and feared Judge Dredd assists rookie Judge Hershey in violently quelling a block war. In the same raid, Dredd apprehends Fergie, a hacker and recent parolee, hiding in a city-owned robot. Dredd sentences him to five more years for property destruction. Hershey criticizes Dredd's unyielding approach to the law and his solitary nature. Dredd, in response, reveals that nine years earlier he judged and ordered the execution of his best friend and fellow Judge, Rico, for committing a massacre.
Meanwhile, Rico, secretly imprisoned at the Aspen Penal Colony, receives a covert message. He escapes and returns to Mega-City One. He retrieves his Judge uniform and Lawgiver gun, and reactivates a decommissioned ABC Warrior, a combat robot, to serve him. Disguised as Dredd, Rico shoots and kills reporter Vartis Hammond, a critic of Dredd and the Judges' violent law enforcement.
Evidence incriminates Dredd, who is put on trial before the Council of Judges, including his mentor Chief Justice Fargo and Judge Griffin. Despite Hershey's defense, Dredd is convicted when DNA from the bullets found in the scene matches his own. Fargo retires to spare Dredd's life, requesting leniency as his last act. Dredd is sentenced to life imprisonment while Fargo embarks on the "Long Walk", the final task of a retired Judge to enforce the law in the Cursed Earth until their death.
On the transport to the penal colony, Dredd is coincidentally seated next to Fergie. Their transport is shot down by the Angel Gang, a group of cannibalistic scavengers. Fargo intervenes to help Dredd escape the gang, and the Judges sent after him by Griffin, but is mortally wounded. Before dying, Fargo reveals that Dredd and Rico are clones created by the Janus Project, a genetic engineering program designed to produce perfect Judges using DNA formed from the best traits of the Council, including Fargo. However, following Rico's turn to criminality, the project was abandoned and its existence concealed. Fargo warns Dredd that Griffin conspired to conceal Rico's survival, frame Dredd, and force Fargo's retirement to reactivate the Janus Project, and urges Dredd to stop him.
In Mega-City One, Rico terrorizes the city, killing Judges to weaken their forces. Griffin uses the chaos to convince the Council to unlock Janus and clone a new Judge army to ruthlessly enforce the law. When the Council tries to reverse its decision, Griffin has Rico eliminate them. At the Janus lab in the Statue of Liberty, Rico replaces the original DNA sample with his own to cultivate clones with free will as his "family", refusing to let them be controlled as he was. When Griffin protests, Rico has the ABC Warrior kill him.
Dredd and Fergie return to the city and team up with Hershey, who has uncovered the Janus Project. Together, they infiltrate the lab, where the ABC Warrior injures Fergie and captures Hershey. Rico confronts Dredd for betraying him, but asserts that they are family and offers Dredd the chance to lead the clones alongside him; Dredd refuses. As Fergie disables the ABC Warrior, Rico prematurely activates the clones for backup, causing the lab to explode and destroying them. Dredd pursues Rico to the top of the statue, ultimately throwing him to his death.
Back on the ground, Dredd's name is cleared after the city's supercomputer broadcasts the truth about Janus. The remaining Judges ask Dredd to become Chief Justice, but he declines, preferring to work as a street Judge.