Frailty (2002)

Set in present day Texas, "Frailty" centers on the FBI's search for a serial killer who calls himself "God's Hands." McConaughey plays Fenton Meeks, a young man who approaches the lead investigator, one night, claiming he knows the identity of the killer. The FBI agent is curious, but unimpressed until Fenton reveals that the killer is his younger brother Adam. This is a film about faith, family and the end of innocence.