is there a site to find out snitches names
Yes, there is a site to find out snitches' names. There is a database of police informants and rats or snitches. For more information, please see: http://www.whosarat.com/aboutus.php.
There is not a site where you can find snitches names. The police do publicize the names of their snitches.
You can try at http://goo.gl/ROYRbb.