Toward the end Agent Liz Warner breaks operational security while arresting Tabakian by verbally disclosing to a had guy known for killing witnesses that she has a witness. And pretty much dares him to try to kill the witness.
In the first scene with Agent Liz Warner, you can see her microphone for most of the scene.
The murder takes place at Santa Anita Park, in California, USA, but the victim is watching a race which took place at Hialeah Park, in Florida, because of the editing in of footage from Let It Ride.