Arnold Sentenced to 100 Years Behind Bars - ABC FOX MONTANA NEWS, WEATHER, SPORTS - KTMF/KWYB

Arnold Sentenced to 100 Years Behind Bars

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BOZEMAN -

The woman convicted of attempted homicide for shooting her former tenant back in 2012 will spend 100 years behind bars.

After nearly six hours of testimony from Diana Arnold, 59, and three other witnesses this afternoon, Judge John Brown handed down the sentence around 6:30 Wednesday evening.

Arnold will spend 90 years behind bars for attempted deliberate homicide and an additional 10 years for using a firearm during the incident.

In July, a jury found Arnold guilty of shooting Dave McDunn twice in his home on Springhill Road.

Judge Brown also ordered the justice department to give Arnold her medications and proper diet to help with an existing mental issue.

Attorneys on both sides say they are pleased with some part of the sentencing.

"I think the McDunns are going to be satisfied with the outcome, the sentencing outcome very much," said Marty Lambert, Gallatin County Attorney. "They spent a very long and harrowing 17 months for them."

"I want to make it clear that was not the sentence I would've preferred," said Arnold's attorney, Chuck Watson. "I'm glad the plight of the mentally ill is getting attention in this county."

Also taking the stand today were McDunn's two sons and Arnold's sister.

Arnold is already in custody.

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