[croes]

Why?

There are lies that don‘t poison anything.

For instance police lies in an online chat to be a 12 year old girl to catch a child predator.

[jrs235]

That's an easy situation to deal with. Have someone who isn't an officer sit at the computer and pretend they are a 12 year old girl to catch a child predator and turn the evidence over to the non-lying police.

[croes]

The same trick can than be used in an interrogation.

That’s still lying police just with extra steps.