The first-degree murder trial of Guy Rivera began Tuesday in Queens Supreme Court, with the defendant accused of killing NYPD officer Jonathan Diller. Nearly 100 police officers packed the courthouse to show support as proceedings got underway.

Stephanie Diller, the widow of the slain officer, was present in the courtroom and became emotional as the trial commenced. She was surrounded by dozens of NYPD officers who attended to support the fallen officer's family.

Rivera faces charges in connection with the death of Officer Diller, who was killed in the line of duty. The case has drawn significant attention from the law enforcement community, as evidenced by the large police presence at the courthouse.

The trial is taking place in Queens Supreme Court, where prosecutors will present their case against Rivera. The proceedings mark the beginning of what is expected to be a closely watched murder trial involving the death of a New York City police officer.