A 14-year-old boy pleaded not guilty on Nov. 9 to charges alleging he stabbed a woman Halloween night.

King County prosecutors charged the Federal Way teen with first-degree assault on Nov. 8 after he was arrested five days earlier.

According to charging documents, the boy admitted to the stabbing during interviews with detectives the night he was arrested.

Federal Way police responded to reports of a stabbing in the 31900 block of 14th Way Southwest at about 9 p.m. on Oct. 31.

As the woman was rushed to Harborview Medical Center with a single stab wound to her ribs, detectives tried to uncover what happened.

Charging documents state the woman and her boyfriend were sitting in their living room on Halloween night when their door bell rang multiple times in a row. The woman went to answer her door, thinking it was simply trick-or-treaters. She opened the door, said “hello” but closed it when she discovered no one there.

But once she shut the door, she saw a boy.

“[The victim] thought the person at the door was a trick-or-treater, who must have heard her from around the corner and come back,” the charging documents state. “[She] opened the door with the bowl of candy… offered the male some candy and said ‘you can take two if you’d like.’”

Before she knew it, the boy had stabbed her with a kitchen knife on the right side of her body. The woman screamed and her boyfriend found her sitting on the carpet in the living room floor.

Police conducted a K-9 search of the area but could not initially find the suspect.

On Nov. 3, the father of a friend of the suspect called police to report he had information about the stabbing. Both the suspect’s friend and his father told police the suspect pulled his friend to the side on the morning of Nov. 1 and said he wanted to tell him something privately as “he was the only person he could trust.”

The suspect told the witness details of the stabbing.

The suspect allegedly told the witness that he was looking for his sister’s friend’s house that night. While he searched, he knocked on a “random door” and a woman answered.

“[The suspect] told the identified witness he ‘doesn’t like women like that’,” the charging documents stated. “[The suspect] told the identified witness he took the candy, stabbed the woman, and ran away.”

When asked by police, the witness guessed the suspect had used a knife because a friend told him the suspect had “brought a knife blade to school previously.” He also told police the suspect was “proud” of the stabbing and said the weapon was in his room.

With the approval of the suspect, the witness told another friend. The two witnesses then told another.

In an interview with police, one of the witnesses said he had seen photos of the suspect holding up a rabbit’s spinal cord, and recalled he had brought the rabbit skin to school at one point. The suspect was also allegedly “creepy about women.”

The witness told police the suspect takes photos and video of women without their knowledge and that he has claimed to have stalked girls in the past.

Police found an unrelated harassment case the suspect was involved in, in which he admits to telling a girl “random things to make her think he is weird,” including that he has her underwear, that he would “clone the victim so he could cut off the skin and become her,” he would strangle the victim’s boyfriend to death if he saw her with him and that he knew where the victim lives.

“In [the suspect’s] statement, he advised he was mental and had voices in his head,” the documents continued.

After officers arrested the boy, he provided a post-Miranda recorded statement. The suspect described what the woman looked like, how he stabbed her and what he stabbed her with. He described the clothes he was wearing and where they could be found.

Police seized his cell phone to obtain a Facebook Messenger conversation he had with one of the witnesses, and his green Calvin Kline backpack at a house that appeared to be his residence. When officers searched the house, they found the suspect’s belongings, including a kitchen knife and suitcase, next to a blown up air mattress in the living room.