As Joe Bankman and Barbara Fried sat in a Bahamian courtroom Tuesday, the popular Stanford law professors had to be worried about more than whether their FTX founder son, Sam Bankman-Fried, will go to prison for orchestrating what a federal prosecutor described as “one of the biggest financial frauds in American history.” The couple also have to be concerned about their own legal jeopardy, a criminal law expert said, given reports that they were involved, at some level, in their son’s efforts to build his allegedly fraudulent cryptocurrency exchange into a $32 billion business. They face scrutiny on multiple fronts...