David Wallace / AP
Defendant Jodi Arias, right, talks to her attorney, Jennifer Wilmott during her trial at Maricopa County Superior Court in Phoenix on Thursday, April 11, 2013.
A friend of the Arizona woman at the center of one of the country's most high-profile murder trials says she has been tweeting for Jodi Arias since February.
Though the accused murderer has no access to a computer or cell phone in her Phoenix jail cell, close friend Donavan Bering told NBC News that she has actually been tweeting on Arias' behalf based on telephone conversations they have nearly every day.
The account has been used to mock both the prosecution and pundits who have weighed in on the case that has dominated the national media.
"He who tries to establish his point by much yelling shows that his reasoning is weak," @JodiAnnArias tweeted on April 7, a likely nod to prosecuting attorney Juan Martinez.
Hmm... Anger Management problems anyone?— Jodi Arias (@Jodiannarias) April 6, 2013
Another tweet from the account read, "Hmm... Anger Management problems anyone?"
Martinez, who grilled Arias when she took the stand last month, has become nationally known for his fiery style in the courtroom. Arias has admitted to the killing of boyfriend Travis Alexander in June 2008, but maintains the killing was in self-defense.
Bering met Arias while in jail herself, NBC News has confirmed. She was first identified by local Phoenix Fox station KSAZ. The woman has been a common sight in Maricopa County Superior Court, often sitting next to Arias' mother.
Bering has been an ardent supporter of Arias throughout the trial, so much so that her life has been threatened, she says.
"I just want people to know I won't stop supporting Jodi and her family," Bering told NBC News' Dateline. "I have the right to talk for her and my life shouldn't be threatened."
The case has been the a staple topic on HLN, which has received much of the scorn of Arias on Twitter.
HLN is an acronym for Haters Love Negativity.— Jodi Arias (@Jodiannarias) March 9, 2013
"HLN is an acronym for Haters Love Negativity," the account tweeted last month.
The Arias twitter handle also responded to HLN commentator Nancy Grace, who tweeted a photo suggesting Arias was giving the middle finger during her trial. "Actually, Nancy, that finger was for you. Have a nice day," the Arias account tweeted.
Maricopa County sheriff's spokesman Christopher Hegstrom said authorities are not happy that Arias may be telegraphing tweets from prison, but there is nothing they can do to stop it.
"We don't like it, but at this point she has not been convicted of anything and has the right to make phone calls."
Most days, Arias has about 16 hours where she is free to be out of cell and could make collect calls. Although the phone calls made from the Estrella jail where she is being held are recorded, discussing possible tweets would not likely have raised any red flags, according to Hegstrom.
Two young, attractive people come together, and it's no match made in heaven. Dateline NBC's Josh Mankiewicz reports.
Arias’ attorneys didn’t return calls for comment.
Along with taking swipes at those who have been mean to Arias throughout the trial, the Twitter account is also promoting her art.
"eBay has banned all listings of my artwork. The silver lining in making my art more difficult to obtain is that it keeps increasing in value," it posted on Feb. 22.