Since LB people said:
>Jewish people cover each other
I used to think that was just tribalism but it's actually written into their Talmudic law.
Snitching on a fellow Jew to a gentile state can be punishable by death, even if the law they broke violated Talmudic law.
http://archive.is/QpjyE
Another source on 'moser':
http://jewishencyclopedia.com/articles/11047-moser#anchor3
They can even kill the snitch if they put them in a "self defence situation":
https://en.wikipedia.org/wiki/Rodef
A rabbi telling a kid not to report a pedophile rapist stating it's forbidden, he didn't even ask who the kid meant:
www.youtube.com/watch?v=Cki0RVX841I