What's known about Wagner's Prigozhin and the plane crash?

A plane crashes in Russia, the passenger list including the leader of the Wagner mercenaries. Yevgeny Prigozhin led a brief revolt in June, which was described as treason by President Vladimir Putin, before he was apparently forgiven. What other facts can be drawn from what happened? 

Join Host Cyril Vanier

Guests: 

Pavel Felgenhauer - Defence and military analyst.

Donnacha Ó Beacháin - Professor of Post-Soviet Politics.

Owen Matthews - Author of 'Overreach: The Inside Story of Putin's War on Ukraine'.