East Chicago Police Department, Indiana
End of Watch Thursday, May 24, 1934
Add to My HeroesMartin J. O'Brien
Patrolman Martin O'Brien and Patrolman Francis Mulvihill were shot and killed at approximately 11:15 p.m. by four men believed to be part of the Dillinger Gang. The officers were patrolling a rural section of the old Gary Road when they stopped to talk with four men standing next to a car. Without warning, the suspects opened fire with machine guns, striking both officers multiple times. The suspects then fled the scene.
Patrolman O'Brien had served with the East Chicago Police Department for nearly 14 years. He was survived by his wife and three children.
Led by John Dillinger, the Dillinger Gang was a notorious group of Midwest bank robbers. Associates of the gang were responsible for the fatal shootings of 13 law enforcement officers in 1933 and 1934.
Two infamous members of the gang, John Dillinger and Baby Face Nelson, were shot and killed by law enforcement officers in separate incidents.
The other gang members were either murdered by criminals, shot and killed by law enforcement officers, executed for their crimes, or sentenced to time in prison.
Bio
- Age 44
- Tour 13 years
- Badge Not available
Incident Details
- Cause Gunfire
- Weapon Rifle; Machine gun
- Offender The Dillinger Gang
Most Recent Reflection
View all 12 Reflectionsofficer killed by .45 Machine Gun
officer buried Cavalry Cemetery, Portage Indiana
T.Fazzini
reseacher
September 28, 2017
Recent LODD Deaths

Captain John Robert Randolph, III
Ringling Police Department, OK
EOW: September 25, 2023

Correctional Officer I Robert Clark
Georgia Department of Corrections, GA
EOW: October 1, 2023

Deputy Sheriff Jacob Eric Salrin
Richland County Sheriff's Department, SC
EOW: September 29, 2023

Community Parole Officer Christine Guerin-Sandoval
Colorado Department of Corrections, CO
EOW: September 28, 2023

Deputy Sheriff Marylin Anjanette Mayo
St. Tammany Parish Sheriff's Office, LA
EOW: September 21, 2023

Police Officer Darrin McMichael
Arlington Police Department, TX
EOW: September 21, 2023

Deputy Sheriff Ryan Clinkunbroomer
Los Angeles County Sheriff's Department, CA
EOW: September 16, 2023

Governmental Affairs Liaison Michael Elaine Griffin
Mississippi Department of Public Safety, MS
EOW: September 4, 2023

Police Officer Kevin Cram
Algona Police Department, IA
EOW: September 13, 2023