MCKINNEY, Texas (CBSDFW.COM) – It was two years ago this month that the Richardson Police Department lost its first officer in the line of duty. Now, the man accused of killing officer David Sherrard will stand trial.

The trial for Brandon McCall began Monday in McKinney. He faces two counts of murder, and prosecutors are seeking the death penalty.

(credit: Richardson Police Department)

On Feb. 7, 2018, Richardson police responded to a disturbance call at an apartment complex. However, investigators said it was an ambush.

Authorities said McCall shot and killed his friend, Rene Gamez, and then began firing on officers when they walked inside the unit.

Sherrard, 37, was shot in the neck and later died at a hospital in Plano.

The trial began with the final moments of Sherrard through graphic body camera video. The jury saw Sherrard being shot about five seconds after entering the apartment.

After a five-hour standoff, McCall surrendered. Witnesses said McCall shouted “I’m sorry!” as police took him into custody.

David Sherrard (credit: Richardson Police Department)

Sherrard was a 14-year veteran with the Richardson Police Department and was a married father of two.

During opening statements, prosecutors offered a dramatic account of the shooting, telling the jury that the officer was killed by a laser-pointed rifle and that McCall had positioned himself to ambush Sherrard and others.

Along with capital murder, McCall also faces charges of aggravated assault on a public servant for shooting at seven other Richardson officers during the incident.