Bicycles in German TV Police Thrillers

Judith and I are great fans of "Tatort" (Crime Scene) fresh episodes of which are shown on German TV three Sunday evenings out of four. The programme features a police team from a number of different German cities and regions. One of the most popular features a Kommissar (Inspector) and a pathologist in Münster, the cycling capitol of Germany. The inspector cycles a lot in the city centre. What I find unbelievable is that he arrives at a crime scene or a block of flats, he leaps off his bike, throws it to one side and runs into the building, leaving the bike unlocked. His bike is almost always never stolen! In one of the earlier episodes he lost his new MTB and there was a running gag of the inspector seeing his bike and running off to retrieve the bike. With this experience he still leaves his bike unlocked. Weird!