How many do we not know about?

Illegal immigrant caught working in small California town was hiding truly heinous past

加州一个小镇发现一名非法移民在工作中隐藏着他真正可怕的身世

https://www.msn.com/en-us/news/other/illegal-immigrant-caught-working-in-small-california-town-was-hiding-truly-heinous-past/ar-AA28sPph

elections. /sarcasm!

选举。/反讽！

the curtain!"

幕布！”

Has been for years.

已经多年如此了。

and other stuff. You are naive it you say it can't do it undetected.

还有其他 stuff。如果你说它无法不被察觉地做这件事，那你太天真了。