Headline Wanted

I do my news analyses on the Jerusalem Post, and while looking for a new story to look at I came across this headline: Olmert 'wanted' posters for investigation?

Someone tell me, did he want some posters for an investigation? Even though the "wanted" is in quotes it still doesn't make sense in the sentence. He himself didn't want posters, the police are simply using them for an investigation.

A better course of action would probably have been to say "Police use Olmert wanted posters for investigation" or maybe not even have Olmert in it. Maybe even not use the wanted and just say "Olmert posters". The wanted just makes the whole thing sound weird.

Also why is there a question mark at the end? The story is saying they are trying to find out who made the posters, not who Olmert is!