The woman shot inside the Alliance Center in Lower Downtown on Tuesday has died. She reportedly was the executive director of a nonprofit at the Wynkoop building, but has not been identified.

(See also: Days before her death, Cara Russell told a friend she was afraid of her husband)

The shooter was her estranged husband, according to police. Police said that security footage showed him walking through an alley by the building and attempting to enter through a backdoor before using the center’s public entrance.

Witnesses described a confrontation between the shooter and the victim, after which he shot her multiple times with a handgun, according to police.

Police were on the scene within seven minutes of the initial call about the deadly shooting. Paramedics entered the building alongside the police response unit. The victim was transported to Denver Health and pronounced dead early this morning.

The shooter may have recently been kept at a psychiatric facility for observation because of concerns that he was a danger to himself or others. Police say that there may have been some early indications that a violent incident was going to happen.

Police believe he had travelled from the Buena Vista area, where he had been banned from the local airport. Denver Police said that the Chaffee County Sheriff’s Office and Buena Vista police had checked on other family members and found them unharmed.

There were about 200 people in the building at the time of the shooting. The center is closed today.