They tracked back who sold who shorted and who had sold just before--just at that time.

监管局追查出是谁卖出的,是谁在放消息前卖出股票

耶鲁公开课 - 金融市场课程节选

There were some problems with that deal and I just give you one news report on that, but you can follow it if you're interested.

那项交易里存在很多问题,而我仅仅给了你一段关于它新闻报道,不过如果你对此感兴趣你可以去追查一下

耶鲁公开课 - 生物医学工程探索课程节选