In which European city did an experiment in removing criminal penalties for use of drugs including heroin turn out badly?

Question

Quizplus · Accepted Answer

The experiment of removing criminal penalties for drug use, including heroin, was carried out in Zurich, Switzerland in the 1990s. It turned out to be a failure as drug-related crimes and violence increased in the city, leading to the reintroduction of criminal penalties for drug use.

In Which European City Did an Experiment in Removing Criminal