I feel like JA has created a truly alternate reality in her head where she thinks that the lies she's spewed for years are actually true. I can't think of any other way, as a reasonable human being, that I can believe someone could be that cold, vicious and still lying and blaming the victim.
I know some people truly are innocent and will say for years that they are and this is not what happened and I feel for them, but that's simply not the case here. So I would think this would be the time you at least show slight remorse but she's built her lies up so much that she really thinks she is the ultimate victim in every way, of Travis, of Juan Martinez, of the justice system, etc. I can't even imagine what it's like to be in her head and I don't want to.
I also think she doesn't truly understand premeditation. Since she's created this alternate reality where she didn't do all the premeditating in Yreka, she somehow convinced herself she'd get off on that charge, not even taking into account the premeditation during the actual killing itself.