Raffaele Sollecito has said he has unanswered questions about Amanda Knox's behaviour after the murder of her roommate Meredith Kercher in 2007.
In an interview that aired on Italian television and published by MailOnline, Sollecito said Knox left his house the morning before Kercher's body was found and when she returned hours later, she seemed 'very agitated'. She said her front door had been broken into and that she had found spots of blood in the bathroom.
"Certainly I asked her questions," Sollecito said in the interview, which aired in part on the Today show on Monday.
"Why did you take a shower? Why did she spent so much time there?"
The interviewer asked what answers he had to these questions.
"I don't have answers,' he responded.
NBC legal analyst Lisa Bloom said Sollecito seemed to be distancing himself from Knox - his girlfriend of just a week at the time of the murder - with these latest comments.
'He's saying that there's some evidence that may apply to her that doesn't apply to him,' she said.
On January 30, an Italian appeals court reconvicted the pair of murdering former roommate Kercher - a ruling the pair are again appealing.
"I am frightened and saddened by this unjust verdict," Knox wrote after the ruling.
"Having been found innocent before, I expected better from the Italian justice system."
Sollecito did appear in court for the appeal and, after they were reconvicted, he was found in a hotel near the Italian border before having his passport revoked.
Of his role in the case, Knox said: "He is collateral damage in the unreasonable, irresponsible and unrelenting scapegoating of the prosecution’s grotesque caricature that is 'Foxy Knoxy'."
Knox's blog post came as she released a grim portrait of herself on her Twitter feed that shows her holding up a sign declaring her innocence in Italian.
The 26-year-old is shown in a black-and-white photo, holding a piece of paper with the words 'SIAMO INNOCENTI' which translates to 'We are innocent'.