Wake services were held Monday for the NYPD officer who died in last week's wrong-way crash on the New York State Thruway, but some fellow officers are speaking out after they say they were not allowed to attend in uniform.

Dozens of loved ones turned out at the Michael Higgins Funeral Home in New City to remember NYPD Officer Richard Christopher.

The Army combat veteran, who served three tours of duty overseas, was killed instantly last week on his way to work in the Bronx after driving the wrong way on the Thruway.

Christopher's car collided head-on at high speed with an SUV driven by 59-year-old James DeVito, from Airmont. DeVito also died on impact.

One NYPD officer told News 12 off camera that there were no fellow officers in uniform at the wake because they were ordered to come in "plain clothes" to avoid "bad press" because the 32-year-old was allegedly responsible for the crash.

The officer, who wished to remain unidentified, also said transportation notices were posted inside several precincts.

Witnesses told authorities they observed Christopher deliberately make a U-turn to travel southbound in the northbound lane. Family have blamed the horrific crash on exhaustion from working long NYPD shifts.

Police say autopsy results showed no signs of drugs or alcohol in Christopher's system at the time of the crash. Toxicology tests are pending and could take weeks.

Christopher's funeral and burial are scheduled for Tuesday.

News 12 has also learned Christopher was engaged to be married with a baby on the way.