A Casper man accused of killing his wife has changed his plea in court.

Forty-six-year-old Thomas Miller is now pleading not guilty to one charge of first-degree murder, one charge of aggravated assault and two charges of child endangerment.

He originally pleaded not guilty by reason of mental illness to the charges.

Police say in late March, Natalie Miller called 911, claiming her husband was going to kill her.

When they arrived, they found Natalie bleeding on a front door step suffering from apparent gun shot wounds.

Emergency medical personnel later declared her dead at the scene.

Another person at the Miller’s home at the time said Thomas and Natalie got into an argument over money earlier in the evening.

When the conversation ended, prosecutors say Thomas got his .45 caliber gun and when Natalie realized what was going on, she tried to flee.

She ran to a neighbor’s house, where investigators say she was shot by Thomas.

His trial is scheduled for the week of October 28th, and prosecutors have said they will not seek the death penalty if he is convicted on the murder charge.