It was somber day across the Hudson Valley as family and friends began their final goodbyes to NYPD Officer Brian Mulkeen.

The Monroe native was killed by friendly fire on Sunday after a struggle with a suspect in the Bronx.

A wake was held Thursday afternoon and another service was held Thursday evening at Smith, Seaman and Quackenbush Funeral Home in Monroe.

His funeral will be held Friday at 11 a.m. at the Sacred Heart Church.

Officer Mulkeen's alma mater will also close Friday for his funeral. The Monroe-Woodbury School District superintendent emailed parents saying around 25,000 people are expected to attend Mulkeen’s funeral, meaning there will be several road closures.

His family released this statement saying, "Brian always had a strong and commanding presence and dedicated his life to making the world around him better. We couldn't be prouder, and hope he continues to serve as an inspiration to others. He will never be forgotten and was loved by everyone. He is a true hero."

MORE: For the 2nd time this year, NYPD gunfire kills 1 of its own 

MORE: Mourners line highways as fallen NYPD officer is brought home to Monroe 

MORE:  Police: NYPD officer from Yorktown Heights fatally shot in the Bronx