Amanda Knox was acquitted from the murder case filed by the Italian prosecutors for Meredith Kercher's death. But it comes with a huge cost.

Author Douglas Preston, who wrote "Trial by Jury" which is a book about Amanda Knox's murder trial, said that the student's family has gone bankrupt.

"The [ordeal] has been hugely emotional, but the financial impact has been catastrophic," Preston told Radar Online.

Amanda Knox received $4 million for the 2013 novel "Waiting to be Heard" but all that money went to the legal fees.

"She really wants to establish that she's innocent in Italy, they've paid a lot of fees to Italian lawyers," the author said.

Aside from money troubles, Amanda Knox is also suffering from post-traumatic stress disorder.

"She was threatened with rape from a male guard, it was a really terrible experience. I think it has really affected her, [it's] really hard to lead a normal life after that," Douglas Preston added. "She went to Italy as a normal 20-year-old, West Coast girl, a soccer player, rock climber, very naïve."

Amanda Knox's murder trial has also been dissected online, which proved to be very divisive. The lot who thought she was guilty were unrelenting in their criticisms and personal attacks online.

"Anyone who has been through what she's been through is going to have issues. It's like a soldier come back from Iraq, having children shot in front of him, you've been through a horrific experience," the author said. "If it doesn't affect you physically, it affects you emotionally."

Amanda Knox, meanwhile, is trying to be optimistic as she plans to advocate the cause of people who are wrongfully accused.

In an opinion piece published on Seattle Times, Raffaele Sollecito's ex wrote, "I am all too aware of how lucky I am to have received such strong support. I am also aware that countless other wrongfully convicted people do not have such support. I will work to give a voice to those individuals."

"I will do this because I know how a wrongful conviction can destroy one's life, and because we best honor crime victims by ensuring that the actual perpetrators are brought to justice."