Killer Joe (2011)

An indebted drug dealer decides that murdering his own mother to collect life insurance is the only solution to his problems. Together with his father, his mother's ex-husband, they hire a hit man who is also a cop, Joe Cooper, to carry out the murder. An amazing thriller, violent, with dark humor and an excellent cast in which Matthew McConaughey excels. An absolute must-see, don't miss it.