In this video recorded yesterday, political opponent Alexei Navalny appears to be in good health and good spirits, joking with a judge during an online hearing, asking for money after a court order blocked all his accounts. Just one day later, according to the Russian prison system, Navalny became seriously ill, fainted, and fell during his morning walk in the prison where he was detained in Siberia.

And so ends, at the age of 47, the journey of Vladimir Putin's sole major political opponent.