I recommend you read this essay from Willy Allison at the World Game Protection:
He includes a number of examples where audio would have helped solve an incident, including:
*** ******* ****** ****** ******* *** bets *** ***** *********** ******* ** the ****. *** ******* ***** ****** confusing **** **** ** *** **** were *******. *** “**** ****” ***** never ****. *** **** *** *** picked ** ** ************ *** ** a ****** ** *** ***** **** was ********* *** ****** **********.
* ****** ***** ***** **** ****** the *******. ** **** *** **** won. ** **** **** *** ****** friend ***** ***** *** “*** ******” on *** *** ******. *** ****** never ****. ** ****** *** ****** and ********** ***. ** **** *** player (*********) ****** ** *** ** was **** * *** **** ******* the ******. ** ***** ** *** case, ** ** ***** **** ******* ours.
*’** ***** *** **** ********* ***** collusion ***** ********* ****** ****. **** often **** *** *** ***** ******** are *** ********** ** ***** ** no ***** ******** ** *********** *** story
**** ** *** *****?
***** *** ********* ****** **** ****** technically ** *** **** ** *** old ****** **** *** ***** ********* not ****** ****.
*’* * *** ******* ** *** author’s **** ********* ** *** ******** of ***** *********, ****** ** *** very *** ** *** *******:
*** ******* * *** ** **** although **** ******, ********* ******, *** one-party ******* ******, **** ** *** preventive ******* **** ******* ************************* * ****** ********.
**** ***** ******* * ******* *** a **** **** *** **** ***** they ****** ***** ** **** *** dealers **** **** **,***** *** ****** ** ***** ********* to *** ***** ******* ****** ****.
**** ********* ******* ************* (**** *** dealer **** ** ***** ******* ***** hear), **** * ******* **********, ***** absent * ***** ***** ** ******* in *** ******.
** ******** ****, * ***** ******* consent ***** **** ** ** ***** clearly *** **********, **** ***** ************* are ***** ********/*********, ********* **** ******* may *** ** ******* ** **.