FLORENCE, AZ - Authorities say convicted Valley serial shooter, Dale Hausner, died Wednesday afternoon.
According to the Arizona Department of Corrections, the 40-year-old inmate was found unresponsive in his cell just after 12 p.m.
He was transported to Florence Hospital at Anthem and was pronounced dead at 1:15 p.m.
The department's Criminal Investigation Unit is leading the investigation Wednesday regarding his death.
Hausner was convicted of 80 crimes, including six counts of 1st degree murder, attempted murder, aggravated assault, cruelty to animals and other charges on March 13, 2009.
The Arizona Supreme Court upheld the death sentences of Hausner in July 2012, according to The Associated Press.
He and Samuel Dieteman, known as the "Serial Shooters", went on a series of random nighttime shootings in 2005 and 2006.
Dieteman testified against Hausner and was sentenced to life in prison, The AP reported.
Their victims included pedestrians, bicyclists and animals.
In October, Hausner wrote a letter to a judge saying it was too stressful to appear in court and wanted to be executed quickly.
The judge appointed a psychiatrist later in November to examine Hausner after he submitted his letter.
On Wednesday night, Hausner's brother Randy issued the following statement to ABC15:
This ends the life of a person who chose to do horrible things innocent people. We as a family, stand with the victims of the crimes, and their families. Today, a murderer died, and is now going on to face the ultimate Judge. Again, our thoughts and prayers are with the innocent people that were victims of his senseless crimes.
Paul Penzone, who was in charge of Silent Witness when the crimes occurred said, "There is evil in the world and Dale Hausner represented that."
Stay with ABC15 News and abc15.com for the latest.
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