The message was gone. But the headers remained. And in the "X-Originating-IP" field, instead of an address, there was a single string of text:

Silence. Then: "That’s impossible. I wiped those drives myself."

The webmail portal for the National Police of Ukraine, using the platform, is located at mail.police.gov.ua . Access & Features

: Provide the authorized police department email address and unique password.