Show court information that must free murderer essentially (6)

I believe the answer is:

evince

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'show' is the definition.
(synonyms)

I don't understand the remainder of the clue.

(Other definitions for evince that I've seen before include "Show or display clearly" , "Show or reveal, say interest" , "Manifest, show" , "Give expression to" , "Prove beyond doubt" .)

I've seen this clue in The Telegraph.

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