Talking to Policemen while Drunk May Not Be a Good Idea

An anecdote:

An acquaintance of mine once had a night out. He had already been drinking quite a bit when he decided to really light things up and buy some cocaine from street dealers. Don't ask me about details, but when the transaction was over, he still had no cocaine but they had his mobile phone.

What do you do when you get robbed? You go to the nearest police station and report it.

"So, what happened?", asked the cop.

"Well, I went to those guys, I wanted to buy some coke... Oh."

The cop's reaction?

"Well, I haven't heard that."

After all, this is Germany, not the USA.