On April 14, 2011, James Fan stood on the landing of a parking garage at Newark Liberty International Airport, a cheer-up letter from his young son in his pants pocket, the prospect of a four-story leap facing him.

Fan, 39, had been charged a day earlier with insider trading based on his knowledge of Seattle Genetics Inc., a health-care company where he was manager of clinical programming. Also charged: his younger brother, Zishen, who was scheduled to take the oath of U.S. citizenship a month later.