Meaning of the word "no one should be judge in his own cause" in English

What does "no one should be judge in his own cause" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

no one should be judge in his own cause

US /noʊ wʌn ʃʊd bi dʒʌdʒ ɪn hɪz oʊn kɔːz/
UK /nəʊ wʌn ʃʊd bi dʒʌdʒ ɪn hɪz əʊn kɔːz/
"no one should be judge in his own cause" picture

Idiom

a principle of natural justice that no person can judge a case in which they have an interest or bias

Example:
The CEO cannot lead the internal investigation because no one should be judge in his own cause.
To ensure fairness, the committee recused him, citing that no one should be judge in his own cause.