David Yellen, a longtime leader in legal education and the former dean of Loyola University Chicago School of Law, abruptly resigned as president of Marist College on Wednesday after three years in the job.

Yellen and university officials offered little explanation for his departure, raising questions among the Marist community over why, exactly, he left. In an announcement of Yellen’s resignation, the school said he will take a sabbatical then “pursue other leadership positions in higher education.” A spokeswoman for Marist—a private liberal arts campus in Poughkeepsie, New York—described the move as a “personal decision,” without further elaboration.