"Informerede du politiet?"

Translation: Did you inform the police?

[AlexYoung12]

Why is "have you informed the police" wrong?

[RyagonIV]

Your sentence is a different tense, namely present perfect (have + participle). Asked here is simple past, though. Your sentence would be translated as (if I'm not mistaken) "Har du informeret politiet?"

[StripyStockings]

Why is "You informed the police?" not accepted?

[hoyastang]

I agree this should be accepted. It is proper English grammar and it means the same exact thing.

[fred371888]

'Have you informed the police' means the same as 'did you inform the police'!