Omaha Police said Monday afternoon its preliminary investigation indicates Dr. Robert Anderson shot his wife Karla in their home Sunday night and then turned the gun on himself.

Autopsies was completed Monday morning to determine the causes of death. What law enforcement wants to know is, what happened that led to the killing? That very question brought Douglas County Attorney Don Kleine to get a firsthand account of the scene Monday morning.

The bodies of 71-year-old Robert Anderson and 63-year-old Karla Anderson were removed from their home at 112 South 50th Street near 50th and Dodge shortly after 9 a.m.

Dr. Anderson worked in a division of the Workers Compensation Court for the state of Nebraska. Karla was a nurse at the Nebraska Medical Center.

Firefighters were called Sunday night to check on an unconscious person. After one look at the scene, police were called in. Police have not said who made the initial call.

There was concern someone might still be in the house, so a SWAT team surrounded the residence for nearly two hours until it was determined there was no one else inside.

Neighbors say the Andersons had lived in the house for many years. They raised their children there and they had regular visits from their grandchildren.

"I just saw them a few days ago," said neighbor Kristen Henderson. "I wouldn’t (have) thought anything was going on, they always have their grandkids, they really seemed like real family people."

Neighbors can't imagine what led up to this tragedy. “They're always out with their kids and very helpful to the elderly neighbor next door and they're always helping her and they just seem…I never thought anything like that would happen,” said Henderson.

"They were really sweet people,” said Liz Udhus. “They would watch the kids every once in a while and they would go swimming over there, just really, really sweet. We weren’t expecting anything like this."

Alice Feder has lived in the neighborhood for more than 40 years and knew the couple next door, their kids and their grandchildren. “They've been good to me. When I had my first mini-stroke, she said you're gonna go to the hospital. I'm taking you, you get ready."

"I'm anxious to find out what happened." Feder woke up to a midnight phone call telling her detectives wanted to speak with her. Like most people who live on the normally quiet street, all she could tell them was good things about the couple.

"They were really nice neighbors, really friendly.

Area residents were not ready for what they saw, lots of officers and yellow crime scene tape, especially with the 2008 Dundee murder of a housekeeper and a doctor's son still unsolved.

“It’s pretty scary considering what happened here a year ago,” said Henderson. “I'm pretty sure they said that was an isolated incident, too. It’s just kind of concerning when things like that can happen and they really don’t know for sure."

The family of the couple has asked the media for privacy as they deal with the tragedy.