Based on additional evidence from the detective.
Schwarzwald (cake) - a sweet tooth.
The version about Hermit - the recluse is also interesting, but I like the version with TaKo more.
Added after 46 seconds
Maybe the clue about the ships is a red herring? That would be logical.
"Strangely, he was not only fully dressed, but his packed suitcase was also standing at the door of the room."