[RegulatorCountry]

To use the 5th means a person cannot be found guilty

Huh?

Pleading the 5th means refusing to testify on the grounds that it may be incriminating. No one can be compelled to testify against themselves.

It has nothing to do with immunity from a guilty verdict. I've often thought it's more likely to provoke further investigation than well-counseled testimony, myself.

[CodeToad]

Found guilty by their taking the 5th. Context.