Jodi Arias murder sentencing re-trial set for Sept.

PHOENIX -- Jury selection is set to begin Sept. 8 for the penalty phase re-trial of convicted killer Jodi Arias, reports CBS affiliate KPHO.

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

A Maricopa County Superior Court judge set the sentencing re-trial date at a hearing Monday. Judge Sherry Stephens also set an April 11 date for a sealed proceeding, reports the station.

Arias, a 33-year-old former waitress, was convicted of first-degree murder in May for the June 2008 killing of her one-time boyfriend Travis Alexander in his Mesa, Ariz. home, but jurors couldn't reach a decision on a sentence.

Under Arizona law, while her murder conviction stands, prosecutors have the option of putting on a second penalty phase with a new jury in an effort to secure a death sentence.

If the second panel fails to reach a unanimous decision, the death penalty will be removed from consideration. The judge then would sentence Arias to spend her entire life behind bars or to be eligible for release after 25 years.