Long story I won't bore you with, but a case I worked and several conversations were recorded because some State Rep's (not law enforcement) were way out of line and destroying some people's lives in the process. So, when in Court, and after they had "told their story" on the events, findings, recommendations, etc. to the Court, the atty asked them if they had ever threatened X, Y, Z, etc... if they didn't comply with what they wanted, and asked if have they ever said this or that.... and on and on... to which they adamantly denied ever doing. I mean , who could even suggest such a thing ?
Then the attorney asked if they would like to change any of their testimony and if it was all accurate. They had all stated "of course it was". After questioning the last one of them, the attorney pulled out 12 double sided tapes .... informed the present witness of what perjury was and the penalities, and that he would submit them for evidence as well as the transcripts of them, with certain "highlights" which proved that they all actually did ALL of the above and lied about it all on the stand. This person retracted their statements immediately, fessed up and told how the DA, a State worker and them had conspired.... lied, made up stories, threatened folks if they didn't "go along", etc. One person they had been threatening to make life tough for was a Doctor, if they didn't testify and say what they wanted them to in certain court cases. The Doctor, with our evidence, would have lost their license if they did not tell the truth and come clean .... as we had set them up with some examinations where the individual was then examined after their visit with this Doctor, by 3 other independent Doctors, who's findings were quite different than what the Doctor was reporting. This Doctor was writing what she was told to write by these workers. It got interesting. All due to taping some conversations and meetings.
They all lost their jobs, and several other cases they had been involved in where the findings depended upon their testimony were reviewed, and reversed.
Some times there are 'a few' bad people in the system, and sometimes, it is great to watch true justice and the "truth" come to the surface.