Ich will nicht mit der Polizei sprechen!
Think "werde" instead of "will" but you're right!
Unless he just wanted to say that he doesn't want to talk to the police.
Why would last evening not be right?
While I think it's technically not incorrect, "last evening" is quite a bit less commonly said than "last night" or "yesterday evening"
Yesterday evening was rejected for me.
This would be correct in English as well as last night
'Nacht' is night, 'Abend' is evening.
Yes, but I think English speakers, or at least American English speakers, are far more likely to use "night" where Germans would use "Abend." I went out last night, we had dinner together last night...
Yes this is translated incorrectly.
Is technically correct Where were you yesterday in the evening?
Yes, it is just longer.
Ich brauche ein Rechtsanwalt...
Are you trying to start a reddit thread? :P
Why would "Where were they last night?" not be correct?
Because "Sie" is capitalised, meaning it refers to the formal "you". If it referred to "they" it would be written in lowercase i.e. "sie".