Почерк убийцы (The Killer's Handwriting)

The body of a graduate student of the Faculty of Law Evgenia Voronkova was found in the park. The girl was strangled, and the crime scene was fenced off with a special tape used by the investigating authorities. The killer left no other traces. From a conversation with a classmate of the deceased, the investigators learn that they helped each other to collect materials for dissertations and often met with the general scientific adviser, Professor Kryuchkov.