A painter of Dutch origin, Theo had ginger hair, a beard and blue eyes. At the time of his death he wore a paint-stained blue shirt with brushes in his right chest pocket. He also sported beige pants and a straw sun hat with a black stripe.
Theo was found at the Gigantic's deck, near a broken ice sculpture, with his skull smashed. Per Dick, he died after being smashed over the head with the sculpture's head—filing it as the murder weapon. As the ice melted, Dick discovered pumpkin seeds, used to combat seasickness. That meant the killer suffered from seasickness.
Relationship with suspects
Theo was an attendant at Mr Alastor's fifth party aboard the Gigantic. He was accompanied by his apprentice, Renée Daucourt, who frequently had to resist his advances on her. His career was funded by media tycoon George Buchanan, who was furious that Theo was planning to leave Concordia.
Theo accused forger Diego del Lobo of attempting to copy his artwork and sell the counterfeits. As an artist, Theo drew a nude sketch of Giulietta Capecchi, who begged him to destroy the sketch after she changed her mind. He was also tasked by Captain William Fox to create a painting for the Gigantic's inaugural journey. However, he created a painting of the Gigantic sinking, infuriating William.
Killer and motives
The killer turned out to be Renée.
After denying involvement, Renée admitted to the crime. After being mentored by Theo, Renée had managed to surpass his talent. Theo then forged her paintings in order to keep his glory. When Renée confronted him, Theo threatened to break her ticket and prevent her from going to Paris. Angered, Renée smashed Theo's head against an ice sculpture's head. Judge Takakura sentenced her to 20 years in jail.
- Theo resembles nineteenth-century Dutch painter Vincent van Gogh.
- That Sinking Feeling (Case #11 of Mysteries of the Past)
- Behind the Mask (Case #12 of Mysteries of the Past; mentioned on a clue)
- Get Off Your High Horse (Case #40 of Mysteries of the Past; mentioned)