UPDATE: Woman convicted in shooting death of husband

Posted: Updated:
Judge declared a mistrial


PHOENIX -- County Attorney Andrew Thomas announced Monday that Grace Pianka has been convicted of second-degree murder in connection with the 2006 shooting death of her husband, Adam Kostewicz.

The victim was found dead at his Ahwatukee home on April 15, 2006. He had been shot in the head.

According to the probable cause statement filed by Phoenix police, Pianka was found the next day in Prescott. She was arrested two days later.

According to the probable cause statement, a .38-caliber shell casing was found in Pianka's car.

This was second trial of Pianka. The first trial ended in a hung jury.

Pianka will be sentenced May 29.


PHOENIX -- It is a tale of love, greed and death and Tuesday it ended in a mistrial.

An Ahwatukee man was found shot to death in his home in 2006. His mistress found the body and his wife was charged with the murder.

Adam Kostewitz had two women in his life and one of them may have killed him.

The trial took less than two weeks and jurors took less than four days to realize they were deadlocked and nothing could change that.

The judge stated, "We have what you call a hung juryand so I am going to declare a mistrial."

Eight jurors were split down the middle with four believing Grace Pianka killed her husband Adam Kostewicz while the other four were not so sure.

The prosecution says Grace found out her husband was having an affair and leaving her so she shot him four times before fleeing to Bagdad, Arizona where she attempted suicide.

Still the defense argues that in fact Adam was killed by his mistress, Virginia or Jen McIntyre. She is the one who found the body and called 911. She was also subpoenaed to testify in the trial but was no-show. According to the defense, McIntyre did not show up to testify because she is responsible for the murder.

A re-trial for Pianka is set for October 20 and, in the meantime, she remains behind bars.