Sweet Revenge

Since this morning, the newspapers have been full of one news item: There has been a murder in the popular Craftbeer Corner Coeln! The culprit is nowhere to be found, and the details of the crime remain a mystery. Despite forensic evidence and witness statements, even renowned investigators are stumped by this case. Has the perfect crime, one that can never be solved, occurred here?! Your investigation team cannot accept this and takes over the investigation. Who else, if not you, should solve this case? After all, you are the best investigators in Europe! Collect evidence, evaluate the statements from interrogations, look for a motive for the crime, and catch the culprit! You'll have to hurry, though, as there is an immediate risk of escape. Due to the so far scant evidence, the suspects can't be held much longer and you only have 60 minutes left to solve the case!