EN
The article presents theoretical issues related to the interposition to Polish criminal procedure rules known as „prohibition of eating the fruit of the poisonous tree”. The study addressed the following issues: 1) the interpretation of the article 168a of the Code of Criminal Procedure in the version after 1 July 2015; 2) some of the issues related to the possible problems with applicaton of this rule, and 3) axiology and theoretical legitimacy of this regulation.