Marysville Police Department, Montana
End of Watch Thursday, September 13, 1917
Add to My HeroesValmore De Rosier
Constable Val De Rosier was shot and killed in the line of duty.
At approximately 3 a.m. Constable De Rosier and Dennis Shea, Marysville mine foreman, heard an explosion and after searching locations nearby came to a local saloon where the suspects began firing immediately. The first shot struck Constable De Rosier in the hand, and as he was attempting to find cover the shooters continued to fire 13 to 15 shots upon him, striking him in the abdomen. Mr. Shea fled in a different direction and called for assistance. It is believed Constable De Rosier died at the scene.
The shooters were able to escape through the confusion and it is believed that the car was spotted in nearby Helena soon after the shooting but this was never confirmed.
Constable De Rosier was survived by his mother, three sisters, three brothers,
Bio
- Age 35
- Tour Not available
- Badge Not available
Incident Details
- Cause Gunfire
- Weapon Gun; Unknown type
- Offender Not available
Most Recent Reflection
View all 7 ReflectionsRest in peace always knowing that no passage of time can ever erase your service and sacrifice.
Detective Cpl/3 Steven Rizzo
Delaware State Police (Retired)
September 13, 2020
Recent LODD Deaths

Officer Jason Roscow
North Las Vegas Police Department, NV
EOW: February 4, 2025

Chief Deputy Burl Wesley Everman
Bath County Sheriff's Office, KY
EOW: November 9, 2024

Police Officer Philip J. Schifini
Nassau County Police Department, NY
EOW: November 27, 2024

Major Jeffrey A. Burke
New Jersey State Police, NJ
EOW: December 31, 2024

Corporal Dennis Francis Kelly
Delaware State Police, DE
EOW: December 21, 2024

Officer Baldino Morales-Sánchez
Mayagüez Municipal Police Department, PR
EOW: January 25, 2025

Border Patrol Agent David Christopher Maland
United States Department of Homeland Security - Customs and Border Protection - United States Border Patrol, US
EOW: January 20, 2025

Sergeant Mark Butler
Navasota Police Department, TX
EOW: January 15, 2025

Deputy Sheriff Jesus Vargas
Brazoria County Sheriff's Office, TX
EOW: January 15, 2025