The head of a German immersion preschool in brownstone Brooklyn was arrested Wednesday for embezzling nearly $3 million in tuition — and blowing thousands on tickets to pro wrestling matches and luxury travel, according to a new federal indictment. Murielle Misczak, 43, the director of Kinderhaus Brooklyn on Sixth Avenue and Ninth Street in Park Slope, pulled a stone cold stunner when she allegedly spent at least $350,000 in swiped cash on tickets to exclusive WWE matches, some of which she bragged about on Instagram, according to a federal indictment released Wednesday.