The Killer Department

The Killer Department: Detective Viktor Burakov's Eight-Year Hunt for the Most Savage Serial Killer in Russian History is a 1993 non-fiction book about a Russian serial killer Andrei Chikatilo by Robert Cullen. It was made into a feature film titled Citizen X in 1995.

The hardcover overview from Amazon.com reads: "obsessed with finding the killer, faced formidable odds--among them the maze of the Soviet system".

...
Wikipedia