A jury has heard closing arguments in the capital murder trial of an Army staff sergeant from Northern Virginia accused of killing his wife and a police officer on her first shift who responded to the 911 call.

Ronald Hamilton of Woodbridge is charged with fatally shooting his wife, Crystal Hamilton, 29, and Officer Ashley Guindon, 28, in February 2016. Hamilton, 34, is also charged with shooting and seriously injuring two other Prince William County police officers.

He also is charged with attempted capital murder of two police officers who survived the shooting, Jesse Hempen and David McKeown.

During two weeks of testimony, jurors heard evidence that Crystal Hamilton called 911 after her husband struck her and slammed her to the floor. Jurors heard the 911 call which ended with Crystal Hamilton pleading, "Stop!" Prosecutors say Ronald Hamilton shot his wife four times with a Glock handgun.

Several officers responded to the 911 call. The officers tried to enter the house to check on Crystal Hamilton's welfare, but Ronald Hamilton refused to let them in. One of the officers then kicked open the front door, only to find Hamilton crouched with an AK-47 rifle opening fire. All three officers who initially responded to the home were struck, including Guindon, who had just been sworn in as an officer. Hempen and McKeown, who testified at the trial, survived but suffered serious injuries.

Gene Hart, one of Hamilton's public defenders, acknowledged to the jury during Tuesday's closing arguments that Hamilton is guilty of the slayings. But he argued that the killings lacked the premeditation necessary for a capital-murder conviction and possible death penalty. Instead, he urged the jury to convict on lesser charges of either second-degree murder or voluntary manslaughter, saying Hamilton was acting in the heat of passion.

Welcome Officers Steven Kendall & Ashley Guindon who were sworn in today & begin their shifts this weekend.Be safe! pic.twitter.com/92c2YLjcQx — Prince William Co PD (@PWCPoliceDept) February 26, 2016

"The government has to prove to you — what was Ronald Hamilton's intent? What were his thoughts? It is getting inside the mind of the defendant," Hart said.

Prosecutor Richard Conway said the most obvious evidence of premeditation is the fact that Hamilton selected a Glock handgun to shoot his wife, and then upgraded to a more powerful AK-47 rifle in preparation for the anticipated police response.

"A .45 Glock, that's just not going to do it when the police arrive," Conway said.

While prosecutors presented an overwhelming amount of evidence, they were hamstrung by a ruling that barred them from presenting expert testimony like DNA and ballistics evidence or the conclusions of the medical examiner's report.

"Blessed are the peacemakers, for they will be called children of God". #RIPAshleyGuindon pic.twitter.com/AyG7NmYDNt — Prince William Co PD (@PWCPoliceDept) February 28, 2016

The judge barred the testimony after prosecutors missed a deadline requiring advance notice to the defense of such experts.

Hart sought to capitalize on that during closing arguments, noting the lack of DNA and fingerprint evidence and suggesting that prosecutors should have been more thorough in a potential death-penalty case.

"The failure to provide readily available evidence is just startling," Hart said.

Conway told jurors their obligation was to decide the case on the evidence that was in front of them as opposed to "speculating on what else might be out there."

The defense asked jurors to consider what Ronald Hamilton's intent was. "What were his thoughts?" one lawyer asked.

"He started shooting the gun because he’s afraid, he’s scared, he’s reacting," the lawyer said.

The prosecution got the last word.

"War came to Woodbridge," a prosecutor said.

"He brought it," the lawyer added, pointing to the defendant wearing his Army uniform at the defense table.

If convicted of capital murder, prosecutors will seek the death penalty during the trial's sentencing phase. A sentencing phase would likely involve several weeks of testimony, and jurors would choose one of two options: execution or life in prison.