It’s interesting that (a) a military grade nerve agent was used, (b) the dosage given was sub-lethal, and (c) Putin had no qualms about releasing Navalny to German care. Makes you wonder if this was all about sending a message.
People who don't like Putin won't stay long in the office/alive. He's a KGB agent, paranoid about keeping his power, I'm quite sure all activities of Kremlin officials receive his approval someway.