"the 911 operator who took that call thought there may have been something at the end of the conversation" (Steve Thomas)

Do 911 operators go to the trouble of digging up old tapes and listening to them? Or replay them upon completion of a call looking for distant noises and/or conversations?

I asked this question earlier. It is a serious question. I envision a 911 operator clocking in to work and getting on the switchboard/phones, taking calls, making dispatching calls for applicable assistance, ensuring tapes are rolling, and whatever else.

I do not envision at any point in his/her shift replaying old tapes.

In a case that ends in a suspicious death, I could envision the DA's office or Law Enforcement obtaining a copy of the 911 call/tape. I don't envision the "911 operator" playing detective and being the one to contact LE or the DA's office of the tape's contents.

Do you?