I mentioned the time and the network in the previous post in order to help identify which episode of that show I was referring. The time is Eastern Time and the location, just in case that network programs can differ by location, is east Tennessee. 

At 12:30 am today I watched one of those Forensic Files shows aired on the Escape TV network. That show was about the killing of a girl, who was arrested for use of drugs, by her boyfriend when she was about to tell on him, according to the show in exchange for making a deal on her drug charges, for involvement in committing a murder in a black neighborhood, the thing that fits with him being accused as a white supremacist. The show was about how the advance analysis of tiny evidence from a refrigerator belonging to the boyfriend in which the body of that girl was kept for some time helped in convicting him as being the killer and how the police chief kept that refrigerator all that time despite providing no evidencing benefit.

After watching the show I suddenly noticed how it was left a big necessary question unanswered. How did the boyfriend know that the girl who was at police custody was about to tell on him for him to come pay her bail to take her home then kill her? 

Also the girl arrest for drug use in the home of the boyfriend where she was living happened when the cops came to talk with boyfriend about that murder and did not find him home. What police detectives concern themselves about the use of drugs by a person while they are in the process of investigating a homicide? On the other hand, that seems to fit with over compensating not finding the boyfriend at home as something arranged with the police. Or it could be that the girl was the real intended target of the visit by the police in order to keep her away from noticing what her boyfriend was doing by keeping her in prison for drug charges but that path fired back with her wanting to reveal what the boyfriend did . 

The show also talked about how the police chief was seen as behaving crazy or unreasonably trying to find the body of that girl which could be, together with the keeping of that refrigerator all that time, intended to compensate for less than serious investigation.The case was also resolved after the guy was already in jail and enough time had passed to disable the capability to prosecute the mother and sister of that guy, living in the same house, because of covering evidences of the killing and not reporting it.

In short, answering the main question about how the guy knew that the girl was about to tell on him negatively regarding the role of the cops in that can also find support in other things in the picture.

Was that girl betrayed to death by the cops themselves? Did the same people taking credit for prosecuting her killer knowingly conspired creating what led her to death ?

Of course this could be entirely wrong but I couldn't let that obvious question go without pointing it out despite speaking from my stage here.