7 Days S01E12 - Last Card Up

At the compound of a religious leader who doesn't pay taxes, the ATF arrives to take him in. But he refuses to give himself up. Things heat up. Later there's a gunshot that sets off a confrontation between the ATF and the cult that ends with everyone in the compound getting killed in an explosion. Now no one knows who fired the shot and what caused the explosion so before they send Frank back, Taldmadge sends him, Olga and Ramsey to get more info.