Who is Wagner chief Yevgeny Prigozhin 

former Putin ally who once sold hotdogs? 

Yevgeny Prigozhin is the head of private mercenary group Wagner 

He was once an ally of Russian President Vladimir Putin. 

At the age of 20, Prigozhin was sent to prison for robbery 

After serving a decade-long sentence, he set up a hotdog stand and soon started a catering business which provided services to Kremlin, earning him the nickname 'Putin's chef'.