Last week, police in Anne Arundel and Prince George's counties displayed more than 20 guns — handguns, shotguns, rifles — and thousands of rounds of ammunition confiscated from the Crofton apartment of a young man who is alleged to have threatened his boss and co-workers. The boss reported the threat to police, and police believe they averted a "violent episode" by taking it seriously.

The list of seized items was long, and included an assault rifle that sells for $1,200, advertised as a "fully military-spec compliant rifle for law enforcement ... now available to everyone." There were 40 steel ammo cases and a night-vision scope that retails for about $2,500. By my rough estimate, the value of the Crofton cache is about $15,000.

The young man hasn't been charged with anything; he's undergoing psychiatric treatment and evaluation.

Police tell us that at least 15 of his weapons were registered — not surprising, but troubling nonetheless. As we've learned before, and in Aurora most recently, there's no need for disturbed people with no criminal or mental health issue in their backgrounds to go into the gun underground for their weapons. They can purchase all they want from licensed dealers.