Engineer Sergey Kitrish, 41, has been under interrogation in the days since the crash, which killed all 10 passengers on board including Prigozhin, who launched a mutiny against Putin in June.
Probe into engineer who carried out last-minute repairs to Prigozhin s doomed plane dailystar.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailystar.co.uk Daily Mail and Mail on Sunday newspapers.