A North Plains-area woman told an emergency dispatcher she heard gunshots after her panicked neighbor appeared in her driveway asking for police and an ambulance Wednesday morning.

In 911 audio released by the Washington County Consolidated Communications Agency, Sharon Zimmerman reports that her neighbor said there was a shooting at her home in the 35000 block of Northwest Mountaindale Road.

The shooting left one person critically injured, the home was later torched and the suspected shooter was found dead inside.

Related: Neighbors recount what happened during North Plains-area shooting, house fire

"They're shooting at someone?" the dispatcher asks.

"Yes," says Zimmerman, 59. "And the neighbor ran over, and said that the guy that lives with them is shooting."

"Are they trying to shoot at someone?" the dispatcher asks.

"I don't know," she responds. "I'm scared."

According to the Washington County Sheriff's Office, Brian Olson, 31, shot his girlfriend's adult son, James Crandall, 24, in the abdomen with a rifle after an apparent dispute. Crandall and his mother, Pamela Crandall, 49, went to their neighbors for help while Olson barricaded himself in the two-story home where the three of them lived.

Flames were spotted from the home about four hours later, and deputies heard a single gunshot from inside, the sheriff's office said. Olson was found dead inside the torched home after firefighters extinguished the blaze. An autopsy determined he died from a self-inflicted gunshot wound to the head.

Related: Suspect in North Plains-area shooting killed himself, medical examiner says

The official cause of the fire has not been released, but the sheriff's office said a propane torch was found near Olson's body. Details of the dispute that led to the shooting have also not been released by the sheriff's office.

James Crandall was listed in critical condition at Legacy Emanuel Medical Center on Saturday.

Shortly after hearing the shots during the 911 call, Zimmerman grows increasingly panicked. The dispatcher makes several attempts to calm her down and get information.

Zimmerman, who lives near Northwest Mountaindale Road and Dairy Creek Road, initially says James Crandall was shot, but later says she believes it was Olson who was wounded.

She later apologizes to the dispatcher.

"I'm sorry, ma'am," Zimmerman says. "I've never had anything like this happen around here before, and I'm very nervous."

"I know," the dispatcher says. "It's very scary, and I understand."

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-- Everton Bailey Jr.