A Clockwork Orange (1971) [DVD9]

In a near future, Alexander "Alex" DeLarge is the leader of a ultra-violent and cruel gang of delinquents composed by Pete, Georgie and Dim. They drug themselves and commit acts of violence, beating beggars and people, raping women, fighting other gangs and robbing. Alex adores The Symphony No. 9 by Beethoven and lives with his parents. When he has a friction with his team, he attacks them to impose his leadership. When they go to a closed spa to rob the owner, who is a lonely lady that has many cats, Alex breaks into the house and kills her, hitting her face with a phallic sculpture. When he leaves the house, Dim hits him with a bottle in his face and he is arrested by the police. Alex is sentenced to fourteen years in prison but two years later, he learns that the government has an experiment that releases the criminal after two weeks of treatment. Alex volunteers himself to the experiment without knowing the price he has to pay.