The Rev. Donald J. Harrington announced Friday that he is stepping down as president of St. John's University in New York. In his announcement, he said that he had been contemplating retirement for some time, having served as president for 24 years and having overseen numerous improvements at the university. But he also acknowledged -- without detail -- "the difficulties for everyone during the past year." Father Harrington has been the subject of much scrutiny and investigation since New York Magazine outlined a series of business ventures involving Father Harrington and his chief of staff, Rob Wile. St. John's has also been in the news over the trial of a former dean, Cecilia Chang, who was accused of defrauding the university and forcing international students to do personal work for her. Chang killed herself while on trial.