As far as I know (documentary in school a few years back), the officer/official responsible was officially convicted but didn't actually get any punishment.
Link doesn't work btw
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Oh wait, it does
You can see the Court struggled to sort of justify it though.
" In the light of the foregoing, the Court considers that it was the
applicant’s second confession at the trial which – alone or corroborated by
further untainted real evidence – formed the basis of his conviction for
murder and kidnapping with extortion and his sentence. The impugned real
evidence was not necessary, and was not used to prove him guilty or to
determine his sentence. It can thus be said that there was a break in the
causal chain leading from the prohibited methods of investigation to the
applicant’s conviction and sentence in respect of the impugned real
evidence"
So because he was convicted because of his second confession, not the confession he gave under torture, his conviction was okay... I wonder what they'd have done if he had shut up about the entire case after they found the dead body. According to the ECHR he should not have been convicted in that case.