don’t know exactly what may or may not have happened to Navalny...however Putin isn’t stupid enough to have him “murdered” following a massive PR coup
And Putin's record of "murdering" ANY of his past political foes is presumptuous.
In our county note worthy people die for assorted reasons in various ways.
In Russia when note worthy people die it is always Putin who did it.
Russia, like the USA, has many different nefarious people and activities - crime, drugs, fraud, etc. - and they are not run out of the Kremlin.