The New York Times has this sad article today. Sad because it is seems so obvious and inevitable. One of the late activist's colleagues notes: “There are good grounds to believe that people in high official positions could be involved. No matter how high-level the client is, he has to be held accountable, otherwise it’s not going to mean anything.”
Certainly a high-ranking official was involved. If it is a high-ranking official, however, he will never be brought to justice.
To be fair, this is not unique to Chechnya or Russia, where the justice system is - to be charitable - not fully developed. In the United States, the people at the top who were responsible for the multiple crimes that led to the war in Iraq will never be held responsible.
Justice exists, but this justice is not administered by courts.