Mike Balsamo

As thousands of mourners prepare to attend the wake and funeral of a second New York City police officer killed in an ambush shooting, police Commissioner William Bratton is urging the rank-and-file to refrain from making political statements.

Thousands of people were expected to attend the funeral of a New York City police officer shot to death along with his partner one week ago in a brazen daylight ambush that shook the city and put an end to large-scale local protests criticizing police following a series of high-profile deaths in police custody.