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More than seven months after a young couple fought with and killed an intruder in a North Bend home, documents released by the King County Sheriff’s Office indicate the dead man may have intended to commit an abduction and sexual assault.

Ken Boonstra, 48, was stabbed 10 times with a butcher knife by the 26-year-old woman as he fought with her husband around 1:40 a.m. on May 13.

Boonstra had a weak pulse when medics arrived but died about a minute later in the dining room of the woman’s parents’ house, where the couple and their infant daughter were staying while their new house was being built, according to the newly released documents.

Boonstra was wearing blue work gloves and had a camera with a flexible tripod in one pocket, a can of chewing tobacco in another. A roll of duct tape and a flashlight were found

not far from his body, according to the records.

Less than 12 hours before the fatal fight, Boonstra had walked into the house through an unlocked door, grabbed the woman by her ponytail and demanded money. He took off with $41, according to the sheriff’s report.

The documents, which are reports from individual sheriff’s deputies involved in the investigation, as well as recordings of two 911 calls, were released to The Seattle Times in response to a public-disclosure request. Both the records and the 911 calls were redacted, with the couple’s names and address blanked out.

The Times is not naming the couple because they were victims of a crime.

The couple, who own an Eastside gym, declined to be interviewed earlier this year until after the Sheriff’s Office closed its case. A message left on the husband’s cellphone Monday was not immediately returned. The husband is also a firefighter.

According to the sheriff’s records, the couple returned home with their 7-month-old daughter around noon on May 12 — Mother’s Day — from a trip to Eastern Washington. About an hour later, the husband had gone to work out when Boonstra walked through a door at the rear of the house and grabbed the young woman. Her mother was also in the house at the time, the records say.

After the woman gave him all the cash she had, Boonstra struck the woman in the face with enough force to send his ball cap flying, the records say. He ran off without retrieving it.

DNA tests later confirmed Boonstra was responsible for both home invasions, the documents show.

With the sounds of her baby crying in the background, the woman sobbed as she told a 911 operator that a man had walked through her door and demanded money.

“He slapped me and threw me down,” she said, according to a recording of the call.

At one point, the dispatcher told her, “Just take a deep breath, you’re doing good” as the woman frantically asked when deputies would arrive.

“I just want them to be here … I’m sorry, I’m just so scared,” she said.

Deputies arrived and searched the area but didn’t turn anything up.

The woman also called her husband, who returned home from the gym, the records say.

The couple went out to dinner that night, then headed to bed around 10 p.m. — after they had “triple checked” to make sure all the doors and window were locked, according to the documents. Still, the woman didn’t sleep well and around 1:40 a.m., the couple’s dogs roused the husband.

As the husband neared the front door, he heard the dogs growl and ran back to his bedroom, arming himself with a can of wasp spray, the records say. A man charged him in a hallway, and the husband sprayed the wasp spray in the intruder’s face, but it had no effect.

“The fight was on,” the records say. Both men tumbled to the floor, and the wife ran out with a baseball bat and struck the intruder with it until it broke, according to the documents.

After about three minutes, the husband yelled to his wife for help, “not knowing how long he could hold out in the fight,” according to the records. The wife “ran to the kitchen, grabbed a knife and stabbed the suspect several times until he quit fighting.”

The woman’s mother called 911, later passing the phone to her daughter and son-in-law. Before deputies arrived, the dispatcher directed them to move the knife away from the body.

Deputies arrived and found a bloody knife in the kitchen sink, a chunk missing from the blade, the records say.

Boonstra, who was arrested in April 2012 over two shoplifting incidents at a gas station in Snoqualmie, was later identified through his fingerprints.

He growled and grunted but didn’t say a word during the fight, the documents say.

“The overall circumstances indicate that the suspect may have entered the home this morning with the intent of abduction and sexual assault,” one sheriff’s investigator wrote in his report.

There were no signs of forced entry, and the records show that detectives don’t know how Boonstra got inside the house. But someone “wearing the same kind of footwear” as Boonstra had walked through an overgrown bridle trail leading to the house, the documents say. There was also a spot behind the house where “a person had been loitering … as if they were conducting surveillance on the residence.”

Boonstra’s car — a 2006 Dodge Magnum — was found the next day in the 42900 block of Southeast 92nd Street, about midway between the couple’s house and the nearly 7-acre property on Moon Valley Road Southeast where Boonstra had been living in a 23-foot travel trailer, the records say.

Boonstra’s mother later told detectives that her son had been going “downhill” since his divorce four years earlier and that she suspected he had mental-health issues, but that he had refused to accept help, the records say.

She directed them to Boonstra’s YouTube channel, where he had posted 33 videos. According to the sheriff’s records, the videos were essentially monologues, with Boonstra recording mostly religious rants and some anti-women ramblings.

Sara Jean Green: 206-515-5654 or