Not yet. We are waiting!
I found the testimony from AC (Tammy's sister) about the alleged death thread. It is on this page, in part 2:
Watch Live: Tammy Moorer Kidnapping Trial Day 8
Around 1:46 - Testimony about a threat made to a former friend, Jennifer Barganier, begins. There are some objections and calls to the bench, and the full explanation probably begins around 1:50ish. Basically she and her friend had an argument about her friend not showing up to a "filming" and losing keys because she was in a drug house, and the friend filed a police report against AC, saying AC told her that her family had killed before and would do it again. AC states she never said that Jennifer later apologized and said Jennifer is one of her best friends now and "she will testify to this."
Also interesting in this video:
Around 1:10 she starts asking AC about Polly's car, the accident, etc. After watching this, I think someone (AC or TM) had to have made a statement at some point about Polly's car being inoperable because of an accident. Polly's car is somehow involved that night, I just don't know how. (AC testifies that in October, PC wrecked her car, and it got a salvage title so it was still driveable. There are texts proving TM was driving the car on 12/13. No reason to bring this up unless it contradicts a statement that PC's car was inoperable, IMO).
Around 1:20, NL asks a very good question about AC's memory being so good on the 18th because she was couponing. It's pretty funny because even AC knows she sounds ridiculous in her answer, and even glances at the jury (I'm assuming someone snickered on the jury). Her smirk tells it all!