Per some posts on the previous thread, there are thoughts that the Murdaugh family still has enough influence that some local people would be scared to cross them.
If that's the case, they wouldn't even need to get a "good ol' boy" on the jury. If any jurors worry that things said in the jury room may get back to the ears of the Murdaugh family, some jurors may self-censor their thoughts, ideas, etc. For sure Murdaugh and family will also know who the jurors are; would that info come into play long after a verdict? Basically, they don't need someone in person on the jury pushing for "not guilty" or arguing that things are not proven beyond reasonable doubt. Fear is a great motivator & may sway the jury even if there's not a Murdaugh ally in the jury room.
I'm surprised the prosecution didn't push for a change of venue.
MOO.