17 January 1897 (+) is born in Auxerre, France.

20 May 1917 (x) has his left foot ripped open by a German hand-grenade during a bitter fight in Aisne, France.

24 March 1919 (x) is discharged from the army and released from a hospital in Rennes, France.

4 July 1919 (x) is discharged from the army in Paris, France.

15 December 1921 (x) graduates from the university as a doctor of medicine with the tract ‘Contributions to the study of Acute Progressive Paralysis’ in Paris, France.

25 July 1926 (x) is elected as mayor in Villeneuve-sur-Yonne, France.

4 June 1927 (x) marries 23-year-old Georgette Valentine Lablais in Seignelay, France.

29 January 1930 (x) is sentenced to 3 months imprisonment and fined 200,- Francs for attempted fraud in Sens, France.

4 April 1936 (x) is caught in flagrante delicto stealing a book in Paris, France.

23 May 1941 (x) buys a property from Marie-Sidonie Desmit, wife of Joseph Marie Rodolphe, Prince of Colloredo Mannsfield in Paris, France.

2 January 1942 (-) murdered Joachim Guschinow in Paris, France.

22 March 1942 (-) murdered Jean-Marc Van Bever in Paris, France.

25 March 1942 (-) presumably murdered Marthe Khait in Paris, France.

7 May 1942 (x) An unidentified male headless body is fished out of the Seine and presumed to be the first victim of Petiot in Saint-Ouen, France.

26 May 1942 (x) is sentenced to one year on probabtion and fined 10.000 Francs for prescribing heroin to drug addicts Jean-Marc Van Bever and Jeannette Gaul in Paris, France.

5 June 1942 (-) murdered Denise Hotin in Paris, France.

20 June 1942 (-) murdered Paul Braunberger in Paris, France.

16 July 1942 (-) murdered Kurt Kneller in Paris, France.

17 July 1942 (-) presumably murdered Greta Kneller in Paris, France.

8 August 1942 (x) The bodies of the Kneller family, victims of Petiot are found floating in the Seine in Asnières-sur-Seine, France.

21 May 1943 (x) is arrested by the French Gestapo, suspected of leading an escape-route for jews under the alias of 'Dr. Eugène' in Paris, France.

13 January 1944 (x) is released from prison by the French Gestapo in Fresnes, France.

11 March 1944 (x) Discovery of human remains from at least 20 bodies in the basement of Petiot in Paris, France.

2 November 1944 (x) is arrested, posing as Captain Henri Valéry, a hero for the resistance in Paris, France.

18 March 1946 (x) Start of the trial against Petiot in Paris, France.

4 April 1946 (x) is sentenced to death in Paris, France.

25 May 1946 (-) is executed by the Guillotine in Paris, France.