The judicial system in Belarus lacks independence and is subject to political interference.
Belarus still has the KGB secret police. (Wikipedia)
Belarus and Russia have been close trading partners and diplomatic allies since the breakup of the Soviet Union.
Belarus is dependent on Russia for imports of raw materials and for its export market.
Only local residents are allowed to travel by land from Russia to Belarus.
NOTE » When travelling from Belarus to Russia, there may be no proper border check. It has been reported that it is illegal to cross into one country from the other without going through a proper border control if you are not a Russian or Belarussian citizen. As of December 2018, there are rumours that Russia wants to open an international border crossing at the Minsk-Moscow highway in time for the European Games in June 21 to June 30, 2019.