Amanda Knox's now ex-boyfriend, Raffaele Sollecito, released a book revealing his spiral romance with Knox, maintaining their innocence in the murder of British student Meredith Kercher, Knox's roommate, and also admitting how they both behaved "oddly" immediately following Kercher's death.

"Honor Bound: My Journey to Hell and Back with Amanda Knox" states the couple's innocence in the case but reveals their somewhat "bizarre behavior" that may have given police reason to suspect their involvement in the crime, according to Daily Mail. After arrest, Knox reportedly did splits and cartwheels in the police station and sat on Sollecito's lap during her police interrogation, the site reported. The memoir also revealed that Knox and Sollecito smoked marijuana the night Kercher was killed.

While police investigated the crime scene, the couple were nearby kissing and cuddling. Knox received most of the attention and was dubbed "Foxy Knoxy" after she was seen shopping for underwear after the killing, according to the Huffington Post.

According to ABC News, police found their behavior "odd" and Sollecito acknowledged that they had no "real alibi the night of Nov. 1 except each other."

Sollecito and Knox were both convicted in 2009 of killing Kercher and they were sentenced to 25 years and 26 years, respectively. The crime was portrayed as a "drug-fueled sexual assault," according to ABC, however, they were both released this past October after the conviction was finally overturned due to last of evidence.

Kercher, 21, was found "semi-naked" with her throat cut in the home she shared with Knox in Italy in November 2007, according to Daily Mail.

Rudy Guede, a criminal who was convicted separately in the case, remains imprisoned and faces a 16-yer sentence. Sollecito has been very public in criticizing the way the police handled the case. In his opinion, officials reached for himself and Knox and created a conspiracy about Kercher's death instead of focusing on the explanation that perhaps the death was a result of a "burglary gone wrong" by the hands of Guede, the publication stated.

"Honor Bound" will be released on Sept. 18 and Knox's book is due to hit shelves next spring, in a deal with HarperCollins reportedly worth $ 4 million.