Nicola Sturgeon as Hitler has sparked a police probe.The long poster was hung in Charlotte Square near Bute House, the FM's official residence.The banner read, 'Herr Sturgeon for Furher'.Writing on the banner mocked Sturgeon in English but with words spelled as if spoken in a German accent..It read: "Ve vill keep Scotland in Lochdown until ze UK gives me vot I vont." ( )The bottom of the banner read: "Vote me to kill the economy."Imagery shows a photo of the First Minister with a drawn-on