Niagara Falls Police Department, New York
End of Watch Monday, April 29, 1963
Add to My HeroesJohn DeMarco
Patrolman John DeMarco suffered a fatal heart attack when he was confronted by an irate citizen who had received a parking ticket at the City Market on Pine Avenue.
He was transported to St. Mary's Hospital where he was pronounced dead.
Patrolman DeMarco had served with the Niagara Falls Police Department for 35 years. He was survived by his wife and son.
Bio
- Age 60
- Tour 35 years
- Badge Not available
Incident Details
- Cause Heart attack
Most Recent Reflection
View all 1 Reflections"Blessed are the peacemakers: for they shall be called the children of God."
Matthew 5:9
Marshal Chris Di Gerolamo
Federal Air Marshal Service
July 7, 2017
Recent LODD Deaths
Detective Timothy Jones
Park Forest Police Department, IL
EOW: December 3, 2025
Specialist Sarah Beckstrom
United States Department of Defense - Army National Guard - West Virginia Army National Guard, WV
EOW: November 27, 2025
Reserve Deputy Sheriff John C. Stahl, III
Jefferson County Sheriff's Office, IN
EOW: June 8, 2025
Sergeant Terri Jean Sweeting-Mashkow
Indian River County Sheriff's Office, FL
EOW: November 21, 2025
Police Officer Alec Sanders
Alhambra Police Department, CA
EOW: November 20, 2025
Corrections Officer Jeremy Lewis Hall
Virginia Department of Corrections, VA
EOW: November 17, 2025
Police Officer Marc Brock
Vivian Police Department, LA
EOW: November 14, 2025
Corporal Blake Adair Reynolds
Delaware County Sheriff's Office, IN
EOW: November 12, 2025
Police Officer Roger Smith
WakeMed Campus Police & Public Safety Department, NC
EOW: November 8, 2025

