Maybe not guilty, but VERY creepy girl non the less.
Yes but not a sociopath. She likely has a form of autism called "Asperger’s syndrome".
Knox’s lack of social skills, unusual reactions to emotion and lack of concern about appearance — all common in autism spectrum conditions — were clear to everyone who knew her:
“She’s a little dork who doesn’t wear matched socks,” says her best friend, Madison Paxton. …
[Sollecito said]: “I noticed that her opinions on the music were odd. … She didn’t concentrate on the emotions it provoked but only on the rhythm — slow, fast, slow.”
And, like many autistic people, Knox was highly intelligent but also extremely naïve and gullible:
“She’s the smartest person you’d ever know” but “dumb as a rock” when it comes to “street sense,” [her stepfather said]. In conversations with her friends and family, a portrait emerges of a person with a childlike innocence. She was, as her mother, Edda, puts it, “oblivious to the dark side of the world.”
Time.com:Could Amanda Knox Have an Autism Spectrum Disorder?
She was obviously innocent, but yes, a weirdo. Unfortunately for her, wrong place at the wrong time.