The fiancé of Philando Castile — an unarmed man fatally shot by a Minnesota cop last year — hit a woman on the head with a hammer “multiple" times, authorities said.Diamond Reynolds, who recorded the horrific July 2016 shooting of Castile, was booked on second- and third-degree assault for the brazen tool attack.Reynolds and two other women — Chnika Blair and Dyamond Richardson — appeared before a Ramsey County judge on Friday. Bail was set at $90,000 each, and all three are due back in court on Monday, according to the St. Paul Star Tribune.