After a gunman killed 10 people at a Buffalo supermarket on Saturday, New York Gov. Kathy Hochul publicly wondered why a state law designed to prohibit individuals like him from obtaining a gun didn’t work as intended.

In 2019, New York enacted an extreme risk prevention law, otherwise known as a “red flag law,” that can bar individuals who present an immediate danger to themselves or others from possessing firearms. The Buffalo shooter didn’t have a previous criminal record, but he had made serious threats of violence that were brought to the attention of police.

“I’ve asked for the investigation of exactly what transpired there,” Hochul told Buffalo’s WKSE radio on Monday when asked why police didn’t bar him from possessing a gun.

When the shooter was 17, he said that he wanted to commit murder-suicide at his high school. He was required to undergo a psychological evaluation and referred to police, who decided not to take further action for reasons still unknown. So when he turned 18, there was nothing preventing him from legally purchasing a weapon. And he did. The weapon he used in the shooting was purchased from a store in Endicott, New York: a Bushmaster semiautomatic rifle that he illegally modified to increase its capacity.