Czar Rennis
Rennis (left), with subordinates

First Appearance:

June 21st, 1941

Real Name:

Michael Rennis

Known Associates:

Jimmy "Trigger" Doom

Appearance of Death:

June 27th, 1941

Created By:

Chester Gould

Can Be Found:

The Complete Dick Tracy Vol. 7

Mike "Czar" Rennis (“Sinner” spelt backwards) was an underworld kingpin and the boss of Jimmy “Trigger” Doom. Czar was dissatisfied with Trigger’s operation of his slot machine racket, and planned to have the man killed. Trigger suspected this, and decided to kill Czar first. Trigger used a photograph of Czar’s apartment building to determine which window was his. Trigger then shot Czar from his own hotel room across the street (June 27th, 1941).

Czar’s body was discovered by Dick Tracy and the other police officers investigating the death of Ginger Ferret. Czar’s murder was reported in the newspapers. When Trigger saw the story, he realized that the police were closing in on him and made a short-lived escape attempt. Trigger later confessed to Czar’s murder.


  • "Czar" is an alternate spelling of "tsar", the Russian word for "emperor". This term also has been used in the Rogues' Gallery to refer to Big Boy, and in real life, Al Capone.
  • One of the policemen investigating his death refers to him as "Mike Rennis". Based on that, it is possible to deduce that his real name is in fact, Michael.