The grieving widow of slain NYPD Detective Jonathan Diller tore into his killer in a Queens courtroom Monday — moments before a judge sent him to the slammer for life.

Stephanie Diller delivered an emotional statement denouncing Guy Rivera, 36, for the senseless 2024 shooting death of her husband as dozens of New York’s Finest looked on.

“One day you will stand before God and answer for what you did to Jonathan,” she told her husband’s killer.

“You have given us a life sentence without him.”

Queens Supreme Court Justice Michael Aloise said the hefty prison term was an easy decision, — sentencing the cop killer 115 years-to-life in prison.

“Mr. Rivera, it took me five minutes to calculate these numbers,” he said. “It will take you a lifetime to calculate the grief you have caused these people.”

Diller’s wife, who delivered powerful testimony during Rivera’s trial, also slammed him for leaving her young son without a father.

“There is a silence in our house where there should be his voice. The person who lost the most is our son Ryan,” she said.

The slain cop’s mother, Fran Diller, then took her turn, pleading for the judge to deliver the maximum sentence allowed by law.

“Your honor, I have watched the defendant in court over the last two years. I have never seen any remorse, only concern for himself,” she said.

“He didn’t just take our loved one, he took our whole world,” the grieving woman continued. “My son deserves justice.”

Rivera shot and killed Diller during a scuffle with police in Far Rockaway on March 25, 2024, with the fatal encounter caught on chilling bodycam.

Dozens of NYPD officers packed the courtroom during the thug’s trial, providing support for the fallen cop’s widow, who broke down on April 1 when the jury acquitted Rivera of the top murder charge.

Rivera, was instead convicted of manslaughter, attempted murder of Diller’s partner and weapons charges.

Police Commissioner Jessica Tisch called the jury verdict “a gut punch to all members of the NYPD,”  while the department’s union said the hero cop’s family was “devastated.”

“The decision at least gives Jonathan and his family some justice,” Police Benevolent Association President Patrick Hendry told reporters outside the courthouse. “But it doesn’t give them full closure. The pain will never go away.”