Family, Friends & Fellow Officers Remember...

Policeman Mario V. Deiro

Los Angeles Police Department, California

End of Watch Thursday, December 31, 1942

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Reflections for Policeman Mario V. Deiro

Officer Deiro was senselessly killed. May his spirit and his loved ones know peace.

Em Allyn
Citizen/Dragnet Listener

December 6, 2023

Policeman Deiro rest in peace.

Rabbi Lewis S. Davis

December 27, 2022

April 24th , 2019.The Dragnet radio podcast today was dedicated to your service. I researched your time as a LAPD officer. May your name and memory live on.... REST IN ETERNAL PEACE, Thank You for your service. I feel I have a odd tie to you, The article s I found was published om my birthday April 8th. I will ALWAYS remember you know on my birthday.

Juli Garrett

April 24, 2019

April 24th 2019, Dragnet podcast... Thank you for your service!!! ALWAYS BE IN ETERNAL PEACE!!! may your name live on and be found by others....

Juli Garrett

April 24, 2019

Rest In Peace Brother in Blue. You are not forgotten on the 75th anniversary of your EOW.

Officer Mike Robinson, (Ret)
Upland Police Dept. CA

December 31, 2017

I just heard the dedication on Dragnet radio drama. Thank you for your bravery and sacrifice

michael markowitz

May 25, 2017

I just heard the dedication of a Dragnet radio show on Radio Classics, channel 148, SIRIUS/XM Satelite Radio, to SGT Mario V. Deiro. Thank you for your sacrifice! We honor you, a true HERO!

SFC James Wilson
US Army, Retired

March 22, 2017

Just listened to the Sgt. Deiro dedication on the Dragnet radio broadcast. We honor your memory and sacrifice.

Paul Bryan
Houston, Texas

October 19, 2016

I also just listened to the Dragnet episode dedicated to Sgt. Deiro and wished to pay my respects to his family and to the law enforcement community.

Spencer Dunbar

February 7, 2016

To my grandfather, who I never had the opportunity to meet, you were always remembered with fond memories by your family. You would have been proud of all three of your sons, all having a role in law enforcement throughout their lives. It is a tribute to you that you are still remembered and that you instilled in your family the sense of duty it takes to "Serve and Protect" those who can not do so themselves. RIP Grandpa.

Lynn J. Deiro

November 9, 2013

Rest in Peace, Policeman Deiro. Your sacrifice is not forgotten.

Officer 11169

January 14, 2012

Thank you for the ultimate sacrafice you made. May your family know that you have not been forgotten. May you continue to rest in peace.

Police Officer Garcia

December 31, 2011

Your heroism and service is honored today, the 67th anniversary of your death. Your memory lives and you continue to inspire. Thank you for your service. My cherished son Larry Lasater was a fellow police officer murdered in the line of duty on April 24, 2005 while serving as a Pittsburg, CA police officer.

Rest In Peace

Phyllis Loya
mother of fallen officer Larry Lasater

January 6, 2010

You would have been proud of your son "Mario" who worked many years as a Santa Ana Police Officer, mostly as a plain clothes narcotic detective. I can vividly recall the day he told me about you.

John Kenney

December 15, 2009

Detective Lieutenant Deiro - Your face popped up on the rotating memorials on the odmp webpage. I knew there was more to your story so I looked and found it. The following is taken from a article written by retired LAPD Sgt. Glynn Martin, the President of the Los Angeles Police Historical Society. I hope this both corrects and adds any details regarding your loss. Continue to rest in peace, Sir.

There were simpler times in Los Angeles, and in police work. Days when there were far fewer reports to complete, fewer notifications to make and still the job was done. Progress, it seems, means more paperwork. We know this, because we have the paperwork, at least some of it. These pages tell us the story of a Christmas Eve 70 years ago. Unfortunately, it connects us to a New Year’s Eve tragedy some 65 years ago. Mario Deiro worked during this simpler time. He joined the LAPD in 1934 and by all appearances was an accomplished professional by the time of his death eight years later. News accounts list some of the cases Deiro worked. He is credited with saving a suicidal nurse. He was a young homicide detective when there were few. He worked headline cases, then unfortunately became one. Some of his reports are on file at the historical society. One of them details the officer-involved shooting he took part in on Christmas Eve 1937. More shots were fired than paragraphs were written.

Mario Deiro, a detective lieutenant, wearing plainclothes stopped to investigate the report of a man down in the gutter. It was the final day of 1942, and he found one, in front of a beer parlor no less. Deiro checked the report and seemingly wrote off the man’s presence to the seasonal revelry associated with ringing in the new year. As he began to drive off, Deiro was engaged by a suspect who claimed that Deiro appeared to be running over the downed citizen. Words were exchanged and a confrontation between Deiro and a small group ensued. Deiro dropped his drawn weapon. As he stooped to recover the handgun, Deiro’s assailant fired multiple times. One of the rounds struck Deiro in the mouth, killing him instantly. A pair of radio car officers heard the shots and pursued the fleeing suspect and his confederates. Three were captured, one of whom admitted to firing the fatal shot. The murder weapon was recoverd from the suspect before his booking at the jail ward. Seems he had bumped his head while entering the police car.

While the capture and confession were fairly simple, the trial was a different matter. Deiro’s case was ultimately complicated by the fact that he was in plainclothes. The suspect based his defense on a claim that Deiro, an armed man in a suit, was going to kill him. The jury convicted, but of a lesser offense, manslaughter.

Ofcr. K. Moreland (ret. Sgt.)
Monument, CO PD (ret. LAPD)

April 8, 2009

Rest in peace, dear cousin, with all the honored ones who like you lost their lives doing their duty.

Guido R. Deiro
Las Vegas Metropolitan Police

July 6, 2008

We are the LAPD ! We do not leave any Men or Women behind, and we do not forget any LAPD Brother or Sister, who may have fallen in the line – of – duty.

PM Deiro, may Your Soul Rest-In-Peace.

Maj M. B. Parlor

December 31, 2007



December 28, 2007

The radio program Dragnet dedicated its 6-17-1949 show to Sgt. Mario V. Deiro.

John Schroeder

December 23, 2005

Your sacrifice is always remembered.

Former Police Officer Guido Deiro
North Las Vegas Police Dept.

June 20, 2005

Gone but never forgotten. Thank you for making the city of Los Angeles a safer place to live, You are a true HERO.


July 21, 2004

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