The man accused of killing Lafayette Police officer Michael Middlebrook pleaded not guilty Tuesday to all charges stemming from an Oct. 1 shooting at a convenience store. Two civilians suffered non-life-threatening injuries in the shooting.

Ian Howard could face the death penalty if convicted of first-degree murder of a police officer. He also faces three counts of attempted first-degree murder. A pretrial hearing is set for Nov. 28.

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Middlebrook and another officer responded shortly after 10 p.m. to a shooting call with multiple victims at the Big Boy Discount Zone store on Moss Street, and police say Howard exchanged gunfire with them upon their arrival. The other officer was not injured. Howard was arrested shortly after the shooting near the crime scene, according to State Police, which is conducting the investigation.

Howard’s father previously told The Advocate his son suffers from mental illness. One of Howard’s neighbors said he’d shown her his gun a few days before the shooting, and another neighbor said he saw Howard hurriedly leave their Tulane Avenue apartment complex shortly before the shooting was reported.

Follow Ben Myers on Twitter, @blevimyers.