Not only that, they went after the short sellers who were writing about it publicly. > Germany's pursuit of short sellers began when Perring’s previously little-known outfit, called Zatarra Research, published its report about Wirecard. > In March, just three months before Wirecard’s collapse, prosecutors dropped their case against Perring after he agreed to make a donation of an undisclosed sum to a charitable organ…
1. Get a large short position
2. Publish damaging information
3. Profit
It doesn't even matter if the information is true. If it is true, it is insider trading. If it isn't true, it is libel. Either warrants prosecution.