Prosecutors say they will not seek the death penalty in the case against a Casper man charged with first-degree murder.

46-year-old Thomas Miller entered pleas of not guilty and not guilty by reason of mental illness to one count of first-degree murder, one count of aggravated assault and two counts of child endangerment on Friday.

Prosecutors allege Miller killed his wife, Natalie Miller, in March.

According to court documents, Natalie Miller called 911 just prior to midnight on March 26. She told the 911 dispatcher that her husband was going to kill her.

When police arrived at the scene, they found Natalie Miller at a front doorstep of a neighbor’s residence with four gunshot wounds. She was immediately pronounced dead by authorities.

Thomas Miller told detectives that he had visited a bar earlier that night. Investigators say they were able to detect alcohol on Thomas Miller's breath.

Investigators found seven additional shell casings at the scene.

Thomas Miller’s bond was set at $2 million. If convicted, he faces up to life in prison without parole.