Lt. Gov. Kim Guadano attended the service in place of Gov. Christie, who was campaigning in North Carolina for Republican presidential candidate Donald Trump.
The funeral for 31-year-old Sean Cullen, who had been a trooper for about two years, was held in Cinnaminson.
Cullen died Tuesday, a day after he was injured on Interstate 295 in Deptford Township while responding to a car fire. Several fire and police vehicles had emergency lights on, and Cullen was walking near the crash when he was struck.
It was the third funeral for an officer that Christie has missed since December -- and he's taking some heat for this latest no-show, with a mayor even starting a petition for him to step down.
Jersey City Mayor Steven Fulop launched the website stepdownchris.com, calling for Gov. Christie to resign because "Donald Trump on the campaign trail is more important than the people of New Jersey."
The New Jersey Troopers' Union released a statement Monday about Christie's absence from the funeral.
"We are focused on honoring our fallen brother today, and quite frankly we did not expect someone who has consistently shown disdain for law enforcement to pay his respects to the Cullen & State Police family. May Sean rest in peace. A wonderful family, tragic. Governor's decision making is predicated on selfish political opportunism, that much is clear," said Christopher Burgos, president of the State Troopers Fraternal Association of NJ, Inc.
Even while on the road for Trump, support for Christie wasn't reciprocal. While criticizing Ohio Gov. John Kasich for spending so much time in New Hampshire campaigning for the GOP nomination, Trump took a jab at the governor's lack of time spent in his home state.
Watch the clip here:
Christie endorsed Trump for president on Feb. 26 after dropping out of the presidential race on Feb. 11. Since he backed Trump, he hasn't since posted anything to his Twitter account - a place where he was very active up until Feb. 9.
At a news conference Tuesday, Gov. Christie talked about not going to the funeral, saying it's no different than what his administration has done over the last 6 1/2 years -- splitting attendance to various events among his staff.
"I understand that no matter what in this job, I will be criticized. That's fine, but it's no different than what we have done before," said Christie, who said he signed an order last week to honor the trooper.
"If I had been in the state yesterday, I was planning to go to a ground-breaking event in Essex County yesterday, and the lieutenant governor was going to be at the funeral. It would have been no different," Christie added.
Gov. Christie said he will not resign.
Here's what people are saying on social media about the decision to skip the funeral:
@ChrisChristie U bring shame on NJ! NYT says u weren't at troopers funeral...3rd 1 u missed. How much did u sell yourself to demagogue for?— Average Citizen (@Retired_Now) March 15, 2016
@ChrisChristie. Your carrier is over Going with Trump instead of going to a NJ state Troopers funeral. Trump is more important instead of NJ— Pat F. (@patf304) March 15, 2016
Here's an overview report:
(The Associated Press contributed to this report)