It was just one sentence, buried far down in the story:

“I believe the weapon that was recovered at the Alhambra location is not legal to have here in the State of California,” LA County Sheriff Robert Luna said Sunday.

The New York Post reported that the alleged Monterey Park gunman, Huu Can Tran, 72, was essentially nuts:

The gunman who slaughtered 10 people at a California dance club before killing himself had been a regular patron at venue — and believed that the instructors said “evil things about him.”

Huu Can Tran, 72, opened fire at Star Ballroom Dance Studio in Monterey Park late Saturday with a semiautomatic pistol, killing 10 people and wounding at least 10 others before storming the rival Lai Lai Ballroom & Studio, where two bystanders disarmed him.

He later killed himself inside a cargo van during a stand-off with police in Torrance, about 30 miles from Monterey Park, officials said.

The motive for his rampage after a Lunar New Year celebration remains unclear but several disturbing details have emerged about the gunman, who had once been a regular patron at the Star Ballroom Dance Studio, where he gave informal lessons, CNN reported.

There’s more at the original, and the Post is not behind a paywall.

It has been reported that Mr Tran was looking for his ex-wife at the two dance halls; she had been invited, but he had not. It was, as it is so often, a domestic dispute.

Mr Tran used a Cobray M11 9mm semi-automatic pistol, a weapon not highly regarded by firearms experts, but one for which a thirty-round magazine has been available. The Los Angeles County Sheriff said that the weapon was not legal to be possessed or owned in California, but Mr Tran apparently had one anyway. Why, it’s almost as though nuts and criminals don’t obey gun control laws.