Amanda Knox apparently did not kill Meredith Kercher in a “sex game gone wrong,” as had been previously decided by a lower court in Perugia, according to a Florentine appellate judge who released today a 337-page document explaining his decision to convict Knox and her erstwhile Italian boyfriend, Raffaele Sollecito, for Kercher’s murder. Rather, the judge claims, Knox allegedly killed Kercher, her 21-year-old British roommate, because she didn’t like her.

All Italian courts require judges to explain the reasoning behind their rulings, and it likely represents the penultimate step in a seven-year case that has seen Knox and Sollecito first convicted in 2009 then acquitted in 2011 then convicted again in January 2014. Rudy Guede, an Ivory Coast native who was also convicted for his role in the murder back in 2008, is serving a 16-year jail sentence. He is currently eligible to apply for work furloughs from prison.

Judge Alessandro Nencini, along with a second judge and six lay jurors, were tasked with hearing a second appeal that began in September 2013 after Italy’s high court threw out the acquittal that set Knox and Sollecito free in 2011. Italy’s high court cited “inconsistencies” and “legal mistakes” and tasked Nencini’s court with hearing the appeal again. It was not a retrial per se, but rather a fresh look at the appeal process that freed Knox.

Nencini decided that the appellate court that set Knox free erred in evidentiary and legal matters. That court will now have to rule definitively on the case, using Nencini’s reasoning and whatever appeal Knox and Sollecito file for their final judgment. If the high court accepts Nencini’s verdicts, the two will be required to serve their prison sentences in Italy. Knox has vowed she will not return to Europe, but Sollecito, unless he escapes, won’t be as lucky.

The court’s explanation of its decision comes down hard on the first appellate court that overturned Knox’s guilty verdict, at times seemingly scolding them for misapplication of penal codes and for throwing out witness testimony without explanation. “It was an operation of evaluating evidence with using logic,” Nencini wrote, accusing the first appellate court of essentially throwing out testimony that allegedly proved Knox’s involvement, but keeping testimony that supposedly supported her innocence. He used Knox’s prison diary as a prime example. “Look at the contradictions in the evaluation of the diary written in English by Amanda Knox,” he wrote, referring to a handwritten prison diary taken fromKnox’s cell as part of the investigation to determine why she accused her pub boss Patrick Lumumba of Kercher’s murder during early interrogations. “On one hand, the appellate court of Perugia completely devalued the writings when she admitted wrongdoing by accusing Patrick Lumumba. On the other side, they valued it when she defended herself.”

Nencini also ruled that there was plenty of forensic evidence tying Knox and Sollecito to the crime scene, writing “they left their tracks in the victim’s blood” more than once in the document. He accepted testimony that supported the theory that a knife found in Sollecito’s apartment was one of the primary murder weapons, and he reasoned that a second knife was also used that matched a blood stain left on Kercher’s mattress.

The first knife in question was the only hard evidence reexamined in the second appeal, and forensic experts ruled that a previously untested spot on the knife’s handle consisted of 100 percent Knox’s DNA. An earlier court heard testimony that a tiny smidgeon of DNA on the groove of the blade was Kercher’s, but the first appellate court agreed with witnesses who testified that the sample was too small to be considered a perfect match. The second appellate court not only considered the knife to be the murder weapon, it also ruled that Knox “plunged the knife into the left side of Kercher’s neck, causing the fatal wound.”

The second appellate court also reasoned that Kercher’s bra clasp, which had been cut from her body after she was killed, had Sollecito’s DNA on the tiny metal clasp. “The biological trace found on the bra clasp that Meredith Kercher was wearing when she was assassinated belonged to RaffaeleSollecito,” Nencini wrote, agreeing with the judge in the original murder conviction. “The clasp was manipulated by the accused on the night of the murder.”

The court also scoffed at certain rulings laid out by the first appellate court, saying that the court’s reasoning that it would have been easy for “a young athlete” like Rudy Guede to scale the wall and enter the apartment, was borderline racist.

Nencini also ruled that with regard to motive in the murder, it was subjective and personal. “It is not necessary for all the assailants to share the same motive.”

The court picked out small details of Knox’s presumably errant testimony, including how she told police the morning Kercher’s body was found that Kercher always locked her door “even when she takes a shower,” which was later contested by the girls’ other roommates.

Nencini also clearly believed ample forensic testimony, presented by experts examining the original autopsy, that Kercher was killed by more than one person. “”She was completely immobilized when she was murdered,” he said, reasoning that Guede could not have acted alone, and instead likely held her back as Sollecito and Knox knifed her.

The judge also pointed out incongruences in Knox’s testimony about the night of the murder, but noted problems with the other witnesses, which included a homeless man, an elderly woman who said she heard screams. Still, he ruled that Knox’s accusation of Lumumba is vital evidence against her. “It is impossible to separate the two acts,” he wrote.

Using Nencini’s reasoning, Knox’s lawyers now have the roadmap for planning their final appeal to Italy’s high court, likely later this year or in early 2015. However, this same high court threw out the acquittal in the first place, so Knox may need more than luck to walk free. If she is definitively convicted, she will likely face an extradition order to come back to Italy to serve out her sentence. There are very few legal loopholes that would allow an American citizen to escape a court decision by a country, like Italy, that shares extradition treaties with the U.S.