https://www.hrw.org/report/2015/12/16/if-dead-could-speak/mass-deaths-and-torture-syrias-detention-facilities https://www.hrw.org/report/2015/12/16/if-dead-coul

https://www.hrw.org/report/2015/12/16/if-dead-could-speak/mass-deaths-and-torture-syrias-detention-facilities https://www.hrw.org/report/2015/12/16/if-dead-could-speak/ma... There are a few other good sources. I'll try to find them.