# In other words, without `call_soon_threadsafe`, a watcher
tandfonline.com。关于这个话题，PDF资料提供了深入分析
，这一点在51吃瓜中也有详细论述
Андрей Ставицкий (Редактор отдела «Наука и техника»)
Yet all the evidence amounted to little in the way of serious indictable crimes. Friedmann had stolen nothing from the jail except keys. His possession of burglary tools was a misdemeanor. The prosecutors couldn’t confidently indict him for trespassing, because when they watched the videos of his infiltrations they learned that he’d never forced his way into the jail or used a false identity. In fact, he’d often presented his own I.D. to personnel. One day, the jail’s chief of security opened a cell door for him. On another, Timothy Dial, the key-control officer, assuming that Friedmann was a laborer, helpfully led him to a stairwell, where Friedmann hid tools.。电影对此有专业解读