The decision to reject leaking the documents came from Julian Assange, who is widely assumed to have absolute control of WikiLeaks. Mr. Assange claimed that he did not publish the leaks because they were already in the public domain, however, this assertion by the WikiLeaks leader is false according to reporting by Foreign Policy. The leaks demonstrated cruelty and a culture of corruption by the Russian interior ministry (security services).
Via Foreign Policy:
“In the summer of 2016, as WikiLeaks was publishing documents from Democratic operatives allegedly obtained by Kremlin-directed hackers, Julian Assange turned down a large cache of documents related to the Russian government, according to chat messages and a source who provided the records.
WikiLeaks declined to publish the 68-gigabytes of data, all of which came from Russia's interior ministry.
WikiLeaks declined to publish a wide-ranging trove of documents — at least 68 gigabytes of data — that came from inside the Russian Interior Ministry, according to partial chat logs reviewed by Foreign Policy.
The leaks exposed Russian corruption and cruelty. WikiLeaks would not publish them.
“We had several leaks sent to Wikileaks, including the Russian hack. It would have exposed Russian activities and shown WikiLeaks was not controlled by Russian security services,” the source who provided the messages wrote to FP. “Many Wikileaks staff and volunteers or their families suffered at the hands of Russian corruption and cruelty, we were sure Wikileaks would release it. Assange gave excuse after excuse.”