(5 ILCS 305/1) (from Ch. 111, par. 2701)
Sec. 1.
No State, county or municipal officer, whose duty it is to
investigate the commission of any crime or to prosecute persons accused of
crime, shall employ any detective or investigator on a compensation basis
other than that of time, and in no event shall compensation to such persons
be contingent on the success of the investigation or prosecution. Evidence
obtained in violation of this act shall be inadmissible in any court in
this State for any purpose and any person employed in violation of this act
shall be incompetent to testify in any such court as to any information or
evidence acquired by him in such employment.
(Source: Laws 1929, p. 347.)
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