Why did the FBI decline to prosecute?
I know that the premise of this hypo is to question the extent of Dem party loyalism but it seems so strange. We know of a murder but the FBI is ignoring it? I would think that would be extremely relevant information to any voter. I could see if you said that it couldn't be proven but was strongly suspected but this suggests that not only is it true but everyone knows and is just ignoring it?
Is she still the Democratic nominee? Why are they still supporting her?
I think the TS is alluding to the Seth Rich murder. He worked for the DNC and was shot and killed a month or so ago. There are all sorts of conspiracy theories surrounding his death that all basically lead to "Hillary had him killed". I think that the people who believe this sort of thing would be naturally inclined to also believe in wide-spread cover ups and would point to the FBI failing to prosecute Hillary over her use of a private email server as proof that the agency is in cahoots with the Clintons/Democrats.
Of course, there is no evidence of Hillary's involvement in Seth Rich's murder or any evidence that it was a political hit job but the conspiracy theorists will just dismiss that because in their minds, Hillary is a crafty Frank Underwood type skilled at covering her tracks and injecting enough doubt to absolve herself of any connection.