Chicago Police Department, Illinois
End of Watch Monday, August 23, 1920
Add to My HeroesWilliam E. Hennessy
Officer William Hennessy and his partner were assigned to check on the conduct of patrons in a nightclub. When they arrived, an altercation ensued in which Officer Hennessy's partner was attacked by an offender. When Officer Hennessy rushed to his partner's aid, the offender began to fire a gun. Both Officer Hennessy and his partner, Officer James Mulcahy were fatally wounded.
Two men were arrested and held by the coroner. Both men were indicted in August, 1920; On October 20, 1921, both were acquitted.
One of the suspects died in a horse riding accident in 1923 and the other suspect died in 1939.
Bio
- Age Not available
- Tour Not available
- Badge 2461
Incident Details
- Cause Gunfire
- Weapon Gun; Unknown type
- Offender Acquitted
Most Recent Reflection
View all 9 ReflectionsOn this 100th anniversary of your untimely departure rest in peace always knowing that your service and sacrifice will never, ever be forgotten by your law enforcement brethren.
Detective Cpl/3 Steven Rizzo
Delaware State Police (Retired)
August 23, 2020
Recent LODD Deaths

Captain Helio Armando Garcia, III
South Fulton Police Department, GA
EOW: April 16, 2025

Deputy Sheriff Melissa Pollard
Wood County Sheriff's Office, TX
EOW: April 9, 2025

Deputy Sheriff William May
Walton County Sheriff's Office, FL
EOW: April 2, 2025

Police Officer Osmar Rodarte
Marysville Police Department, CA
EOW: March 26, 2025

Sergeant Grant J. Candies
St. Tammany Parish Sheriff's Office, LA
EOW: March 23, 2025

Deputy Sheriff Hector Cuevas, Jr.
San Bernardino County Sheriff's Department, CA
EOW: March 17, 2025

Sergeant Joseph Anthony Azcona
Newark Police Division, NJ
EOW: March 8, 2025

Police Officer Felicia Dee Reilly
Saint Paul Police Department, MN
EOW: March 1, 2025

Deputy Sergeant Martin Shields, Jr.
Hinds County Sheriff's Office, MS
EOW: February 23, 2025