Why? The government won't say.

AP:

A Connecticut shop that sold a gun to the Newtown school shooter's mother has lost its federal firearms license.

The Bureau of Alcohol, Tobacco, Firearms and Explosives revoked the license of Riverview Gun Sales in East Windsor, about 15 miles north of Hartford, in December. The agency didn't disclose why. It was first reported Thursday by The Journal News of White Plains, N.Y.

Authorities raided the store for undisclosed reasons shortly after the December school shootings. Around the same time, a man was arrested for stealing a rifle from the shop.

Shop owner David LaGuercia has said Nancy Lanza bought a gun from him years ago, but couldn't remember what kind.

The Hartford Courant has more:

While the federal investigation did not involve the gun purchase by Nancy Lanza, it started after investigators reviewed the records of that gun sale. Sources have said during that review investigators uncovered other evidence that led to the revocation of the firearms license.

The gun shop is familiar to law enforcement authorities. Omar Thornton, the gunman in the Hartford Distributors Inc. mass shooting that left eight people dead, also purchased guns there, records show.

Also in December a South Windsor man who had received a suspended prison sentence and two years probation in May on charges of stealing a dozen rifles and shotguns from Riverview Gun Sales tried to steal a sniper rifle from the same store but was caught.

Connecticut is a small state and there aren't a lot of shops from which to buy firearms. How the mass killings were the fault of the owner is unclear - indeed, you have to ask the question if the owner is being punished for coincidence? In both mass killings, the guns were legally sold. What else is the owner supposed to do, engage the services of a soothesayer to look into the future?

The owner apparently feels that its not worth the trouble to sell guns anymore since he didn't appeal the ruling on his license. But given the circumstances described, one of the possible conclusions that can be drawn is that the owner is being punished for circumstances beyond his control.