A pregnant Mill Creek woman who was found dead in her home, and her husband, who fatally shot himself, have been identified as Sandra and Sean McIntyre by the Snohomish County Medical Examiner's Office.

A pregnant woman found dead in her Mill Creek home Monday and her husband, who soon after fatally shot himself, have been identified as Sandra McIntyre, 26, and Sean McIntyre, 29, by the Snohomish County Medical Examiner’s Office.

Sandra McIntyre, who posted on Facebook that she had a November due date, was shot in the head at the couple’s apartment in the 14700 block of Main Street, according to the office.

Mill Creek police said Sandra McIntyre had called friends to come over Sunday night to protect her from her husband. She told them he was acting strangely and had armed himself with a loaded shotgun, according to a police release.

Friends thought they had de-escalated the situation and eventually left. But shortly before midnight, neighbors called 911 because they heard “yelling and sounds of a physical disturbance,” according to Officer Ian Durkee.

Police say they believe that’s when Sean McIntyre fatally shot his wife.

By the time officers arrived, no one would answer the door and all they could see was a woman lying on the floor, Durkee said.

Officers then forced entry and found Sandra McIntyre dead.

Around the time officers arrived at the apartment, Sean McIntyre sped away in a black car. Officers pursued him, but before they caught up to him, he shot himself in the head with a handgun, and the car crashed into a semitruck, the Medical Examiner’s Office said.

Sean McIntyre possessed at least three firearms, Durkee said. Detectives recovered a shotgun from the apartment, a handgun inside an open safe and a handgun from the car.

Durkee said it appears officers had not previously been dispatched to the apartment for domestic-violence disturbances.

“It’s going to take a while to get a clear picture of what occurred,” Durkee said of the ongoing investigation.

The McIntyres married in summer 2011, according to an online wedding registry.

According to a Facebook photo album published this month, they were expecting a baby girl.

In an album comment posted Monday, its photographer mourned the loss of Sandra McIntyre, a close friend, and a future niece named Sierra: “My beautiful Sandra, my heart and soul are empty. I will miss you every day of my life. I will never understand this.”

Information from The Seattle Times archives was included in this article.

Alexa Vaughn: 206-464-2515 or avaughn@seattletimes.com.

On Twitter @AlexaVaughn.