Slain officer Wenjian Liu mourned as some cops again turn backs on de Blasio

Thousands of mourners paid final respects to Wenjian Liu, the second New York City police officer killed in an ambush shooting in a patrol car in Brooklyn late December.

Thousands of uniformed officers lined the streets outside the Aievoli Funeral Home in Dyker Heights, where family and dignitaries alike remembered Liu as a model officer.

Some police officers at the funeral turned their backs on the Mayor Bill de Blasio as he spoke, despite a reported request by NYPD Commissioner Bill Bratton last week that they refrain from doing so.

“Officer Liu believed in the possibility of making a safer world – all cops do,” Bratton said at the funeral. Both Liu and Ramos were “murdered for their color, slain because they were blue,” said Bratton.

Bratton posthumously promoted both Liu and partner Rafael Ramos to the rank of detective at Ramos’ funeral on Dec. 27.

Liu’s wife Pei Xia Chen remembered her husband of only three months as her hero, soulmate and best friend.

“He was fearless in and out of work,” she said before thanking officers in attendance.

“I thank you my extended family, my family of blue,” she added.

The service followed last week’s funeral for Officer Ramos, during which hundreds of officers outside the Queens ceremony turned their backs during de Blasio’s eulogy.

De Blasio’s address focused on Liu’s life, avoiding any mention of the weeks of demonstrations for police reform, that police unions say encouraged the officers’ killer to target them.

“We lost in Detective Liu and Detective Ramos the very best of us — everything that we as New Yorkers aspire to be,” de Blasio said.