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The Arizona Republic, Rob Schumacher, Pool, Associated Press
Defense attorney Kirk Nurmi makes his closing arguments during Jodi Arias murder trial on Friday, May 3, 2013 at Maricopa County Superior Court in Phoenix. Arias is charged with first-degree murder in the stabbing and shooting death of Travis Alexander, 30, in his suburban Phoenix home in June 2008.

PHOENIX — Jodi Arias' attorneys have asked a judge to delay until next year a second penalty phase to allow the convicted murderer time to gather witnesses.

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In a motion filed this week, her attorneys are seeking a new trial date for January.

Arias was convicted of first-degree murder on May 8 in the 2008 death of boyfriend Travis Alexander at his suburban Phoenix home.

The same panel failed to reach a unanimous decision on whether to sentence her to life or death.

The judge set a July 18 date for a new jury to be seated to determine Arias' sentence. Her murder conviction will stand.

Her attorneys say they need the delay to allow Arias time to gather witnesses aimed at convincing a new jury her life is worth sparing.