Jodi Arias' lawyers file motion to dismiss all charges

Jodi Arias stands as the jury enters the courtroom before the verdict for sentencing was declared a hung jury for her first degree murder conviction at Maricopa County Superior Court in Phoenix on Thursday, May 23, 2013.

AP Photo/The Arizona Republic, David Wallace

PHOENIX - Attorneys for convicted murderer Jodi Arias have filed a motion to dismiss all charges against her, alleging prosecutorial misconduct.

WATCH: 48 Hours: "Unraveling the lies of Jodi Arias"

The motion filed late Monday alleges a computer forensic expert hired by the defense discovered that thousands of files were deleted from the computer of Arias' ex-boyfriend, Travis Alexander, while it was in police custody.

The Arizona Republic reports that most of the files were pornographic.

Mesa police personnel testified previously that there was no pornography on Alexander's computer, and prosecutors disputed Arias' testimony that she had walked in on Alexander viewing pornography and he apologized for it.

Arias was convicted last year of killing Alexander at his suburban Phoenix home, but jurors deadlocked on her punishment.

New proceedings with a new jury are underway to determine if she'll be sentenced to life in prison or death.