Roll of Honor
Incident
Police Officer Jack Jantzen was shot and killed when walking in on a dispute with a gun in progress while off-duty at 5:15 am Officer Jantzen entered a restaurant at the corner of Middle Country Road and Stony Brook Road where a man was holding his wife and a restaurant employee at gunpoint with a 12-gauge shotgun. When Officer Jantzen attempted to intervene, he was shot and killed. The suspect then shot and killed his wife and the restaurant employee. The suspect fled the scene. Officer Jantzen's brother, also a Suffolk County Police Officer, was the first to arrive on the scene and find his brother. The suspect was later apprehended and charged with murder. He was convicted of three counts of second-degree murder and sentenced to 75 years to life. He will be eligible for parole in 2066. Officer Jantzen had been a member of the Suffolk County Police Department for 6 years.
Survivors
He is survived by his wife, son, mother, and brother.
In Our Keeping
- Permanent identifier
BO-US-NY-ABDACD67- Stewardship
- Maintained by NeuraWeb Global Inc.
- Added to badge.nw
- August 2, 2026
- Last updated
- August 2, 2026
Honored here by 1 tribute.
Are you family? This record can be claimed and maintained by those who knew John. Claim this record.
This page is permanent and free. No fee to view it, no advertising, no tracking, and no account required. It will not be taken down.
Tributes
I never knew you. I am standing here anyway.
Police Officer Jantzen gave the Suffolk County Police Department 6 years.
Thank you for your service to the Yaphank community. Gone but never to be forgotten.
Rest easy, Police Officer Jantzen.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Police Officer John Jantzen is one of 1 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 0% of all 97,772 officers honored here.
In NY, 728 of 2,147 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 33.9% of this state's fallen. That is 33.9 percentage points above the national rate of 0%.
At Suffolk County Police Department, 7 of 27 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 25.9% of this agency's fallen.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. John Jantzen's cause is highlighted.
How John Jantzen Compares
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. John Jantzen is highlighted in Apr.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. John Jantzen was killed by shotgun.
Incident Location
Others Who Wore This Badge
26 officers from Suffolk County Police Department are honored on badge.nw. Showing the 16 most recent.
