CHICAGO (WLS) — Jurors in the trial of a man accused of killing a Chicago police officer were shown disturbing video Thursday.

The video was from the body camera worn by Chicago Police Officer Andrés Vásquez Lasso.

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Steven Montano has been charged in Vásquez Lasso’s murder, and is on trial at the Leighton Criminal Courthouse.

For Vásquez Lasso’s family, some of the day’s evidence was too much to view.

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Thursday marks the third day of Montano’s trial. He faces charges for the murder of Officer Vásquez Lasso in March 2023. A bullet struck Montano in the chin.

On Thursday, Cmdr. Patrick Kinney testified about the video recovered from Vásquez Lasso’s body-worn camera.

The officer’s mother left court before the video was played for jurors.

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In the short video clip, an officer is seen running before the footage pauses as an individual turns and aims a weapon at the officer. The video concludes with other officers attempting to assist Officer Vásquez Lasso, who sustained a head injury from a gunshot.

Prosecutors allege that in March 2023, Montano fled from a residence on South Spaulding Avenue after his girlfriend called 911 regarding a domestic disturbance, and Montano is accused of shooting at Officer Vásquez Lasso.

Attorneys for Montano contend this was a tragedy, and Montano made a bad choice, but it wasn’t murder.

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An Illinois State Police evidence technician testified that five fired bullets were from a Glock handgun that had been identified as the gun found next to Montano. The technician further testified that two fired bullets had came from the officer’s weapon.

Chicago police Sgt. Kevin Norris testified about evidence on the scene, including the weapons, bullets, casings and blood.

Vásquez Lasso’s widow was in court, but she looked down at the ground as the evidence was shown to jurors.

Twelve jurors and four alternates have been selected for this trial.

It’s unclear if Montano will testify in his own defense.

The jurors could begin deliberating as soon as Friday.