Amid the jokes, carol-singing, small talk and turkey on Friday at the annual staff Christmas party for St. Peter's College stood the affable host, the Rev. James N. Loughran, president of the school since 1995. "He looked so good, was so energetic," said Eugene Cornacchia, provost of the Jersey City school. "There wasn't a sign of anything." Yet later that evening, or the next day, the Rev. Loughran, 66, apparently fell down the stairs at his house and died of blunt force trauma to the head and neck. He was found Sunday, Christmas Eve morning, after friends had worried because...