Who is Fleischman from The Case of Comrade Tulayev and what is their importance?

Fleischman is one of the examiners appointed to follow the most serious leads in the Tulayev case. He is a very fat, decorated man with flabby jowls, tired eyelids, thinning hair, and yellow blotches under his eyes. He has really started to age in recent years. Fleischman reads the unsigned confession of Kostia and burns it before filing away the Tulayev case and closing it for good.