She may have posted responses on the website Ask.fm, where people can ask questions anonymously.
She was asked why the family went to visit DiMaggio. The bodies of Anderson's mother and 8-year-old brother were later found in the burning home.
She allegedly wrote:
"He told us he was losing his house because of money issues, so we went up there one last time to support him, and to have fun riding go karts up there, but he tricked us."
When asked why she didn't try to escape, she reportedly responded that DiMaggio had a gun and had threatened to kill her.
One person asked about the encounter with four horseback riders in the Idaho wilderness, wondering if Anderson spoke to them, and why she didn't appear upset.
She reportedly said:
"I had to act calm. I didn't want them to get hurt. I was scared that he would kill them."
A U.S. marshal on the search team that circled Morehead Lake in a plane described the moment they spotted the teen and her captor at a campsite.
"We were actually able to verify that it was male and a female with blonde hair. We definitely were not going to take our eyes off of that tent until we had it covered with ground units," said Steve Jurman. "When we got confirmation that she was ok, it was like a weight lifted off of everybody's shoulders and a job well done."
Anderson says she learned about the deaths of her mother and brother after she was rescued, but also writes that DiMaggio separated her from her mom and brother by tying them up in the garage. She reportedly wrote:
"I will never forgive myself for not trying harder to save them."
She also said in the past couple of days she spent time with her grandparents and got her nails done, painted pink for her mom and blue for her brother, Ethan.
As for DiMaggio's motives, Anderson's apparent posting says: "Because he was a psycho."
When asked if she would have preferred that he was taken alive, she reportedly answered, "He deserved what he got."
There is still no official confirmation that Anderson has indeed broken her silence about her kidnap ordeal. At the same time, there have been no denials about the authenticity of the postings from investigators or her family members.
Anderson could be heading to a fundraiser in Lakeside on Wednesday, which would be her first public appearance since the rescue.