WINONA, Minn. — A Winona man said something didn’t seem quite right about a call — that there was a federal warrant out for his arrest. The caller, who identified himself as from the U.S. Immigration Service, then e-mailed a valid-looking copy of the  warrant. Then Winona man did as instructed by the caller, He went to several stores and bought gift cards totaling $2,950. After the money was gone, the man, who lives in 150 block Waterford Circle, rethought the whole deal and called police. Yes, police said, it was a scam.