Five gangsters were arrested for the attack on the Casino Royale in Monterrey last week that killed 52. The men are Zetas, members of a drug-smuggling gang organized by ex-special-forces soldiers, and have allegedly confessed to planning and carrying out the massacre. Authorities believe the gangsters were extorting the casino. Interestingly, two videos were released Monday. One purportedly shows the five men filling gas tanks moments before the attack, while the other shows Monterrey police cars parked a few hundred feet away from the casino as the fire starts.