The FSB and the Investigative Committee do not initiate such investigations/repression—it's done on the orders coming from the very top, i.e. the administration of the president,
It could be a region, or a ministry, as with the [Russian Ministry of Defense]—usually, they detain one of several deputies, so they could be interrogated about their superiors and colleagues—that, it is believed, makes sure the 'object' is firmly under Kremlin control,
Now this is, of course, a blow to Shoigu,
The role of the FSB [Federal Security Service] is to provide compromising material and squeeze more from the arrested during their interrogations,
Popov, responsible for the development, maintenance and operation of Patriot Park, enriched himself at the expense of this establishment,