JACKSONVILLE, Fla. -

The Florida Supreme Court will hear arguments Tuesday in the appeal of the conviction and death sentence of David Sparre.

Sparre was convicted in the 2010 slashing death of Tiara Poole, a Navy wife whose husband was on deployment at the time.

Tiara Pool

Poole contacted Sparre thru Craigslist. He stabbed her 89 times in what he admitted was a thrill killing.

During the penalty phase, Sparre told his lawyer he didn't want any mitigating evidence presented and didn't want family members called to beg for his life.

The jury came back with a quick 12-0 death sentence recommendation.

Now Sparre's appeal lawyers are saying the judge should have had the jury hear about Sparre's mental health issues.