Via NY Times:
The man accused of killing nine people in a historically black church in South Carolina last month should not have been able to buy the gun he used in the attack, the F.B.I. said Friday, in what was the latest acknowledgment of flaws in the national background check system.
A loophole in the system and an error by the F.B.I. allowed the man, Dylann Roof, to buy the .45-caliber handgun despite having previously admitted to drug possession, officials said.