(CNN/AP) – A sea of law enforcement officers made their way to New York this weekend to pay respects to slain NYPD Detective Wenjian Liu who was killed in an ambush attack.
In light of the events at last weekend’s services for the other officer slain in the attack, the New York Police Commissioner has a message for his entire department.
Detective Liu’s funeral is to be held Sunday morning.
Liu and his partner, Rafael Ramos, were ambushed and killed December 20 as they sat in their squad car in Brooklyn.
The gunman, Ismaaiyl Brinsley, subsequently shot and killed himself in a nearby subway station.
New York Police Commissioner William Bratton issued an internal memo to the department, requesting they remain reverent throughout the services this weekend.
“A hero’s funeral is about grieving, not grievance,” the memo reads.
The message is directed at a group of officers who attended last weekend’s services for Detective Ramos.
Those officers turned their backs on Mayor Bill de Blasio as he delivered his eulogy.
Some believe de Blasio’s support for recent protests against police brutality has encouraged anti-police sentiment.
Commissioner Bratton told CBS’ ‘Face the Nation’ the following day that he did not condone the officers’ actions.
“That funeral was held to honor Officer Ramos, and to bring politics or to bring issues into that event I think was very inappropriate and I do not support it,” Bratton said.
Commissioner Bratton promoted both fallen officers to the rank of detective first grade during Ramos’ funeral.
Gov. Andrew Cuomo also attended the wake, saying his late father would have wanted him to be there.
Cuomo’s father, former Gov. Mario Cuomo, died two days ago at his home.
Cuomo waved to reporters as he entered the Brooklyn funeral home. When he emerged, he called the killings a “tragic story.”
Of his father, Cuomo says he has a hole in his heart and misses him already.