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According to court documents, Wilson was interviewed twice about Cowell's disappearance, but said he never interacted with her and did not know who killed her.
Police said she had been fatally beaten, stabbed and strangled, and an autopsy report concluded that someone tried to cut off her arm after she was dead.
However, other students at the school told investigators that they saw Wilson speaking with Cowell and that he told them he thought Cowell was "hot," the documents said.
When confronted with the DNA evidence during an interview with police on Wednesday, Wilson asked for a lawyer and was arrested.
The documents filed in court Tuesday indicate that several people had concerns about Wilson:
- One friend wrote a letter to police in August claiming Wilson had an "obsession with death, dead bodies and serial killers" and had once tried to choke a female friend.
- Another woman called police and said she worked with Wilson previously and that he told her he killed a guest at a hotel where he worked several years ago by strangling her with a belt, according to the court documents. Police wrote that they were not able to confirm the killing occured.
- A woman who was a student at the Academy of Hair Design with Wilson said that Wilson told her he "liked to cut people up" when he was working at funeral homes. Investigators said Wilson worked at several funeral homes in the Wenatchee area.
When detectives searched Wilson's home they found blood in a basement stairwell, but it was not clear to whom the blood belonged.
In court on Thursday Wilson said he could not afford an attorney and was appointed a public defender. His lawyer did not challenge the bail request from prosecutors, who said Wilson is a "potential threat" to the community despite his lack of criminal history