My comment: 史东 and 王军涛 comment, both of whom are in US. Basically they say: 重庆孙政才一被打下去后，下面这些人也会跟着倒霉. I have doubts, because 公安部原政治部主任 was not based in Chongqing. So far, there is no explanation for his sack -- from news media (domestic or foreign).
(b) Ben Blanchard, China Expels Former Chongqing Police Chief from Party for Graft. Reuters, Oct 9, 2017 https://uk.reuters.com/article/u ... graft-idUKKBN1CE11H
("His downfall preceded that of Chongqing's former top official, one-time city party chief Sun Zhengcai, who was sacked in July [specifically, PUBLIC announcement on July 24] and then put under investigation for suspected corruption")
My comment: This sentence is the most intriguing to me, and appears contradictory to the BBC report above. That is when I look up the official announcement (from 中央纪委监察部网站) which discloses 何挺 was removed a month before ("2017.06 不再担任重庆市副市长、市公安局局长职务").
(3)
(a) 徐豪, 孙政才为何落马？ 人民日报中国经济周刊. Oct 24, 2017 (under the heading 独家). www.ceweekly.cn/2017/0724/199046.shtml
("接近重庆官方的人士告诉中国经济周刊-经济网记者，孙政才或由何挺交代牵出。但此说法未能得到官方证实")
(b) Aside from regurgitating 中央纪委监察部网站, 财新网 has the following observation to say: