Courtney, we're told, had been in Hawaii seeking treatment for PTSD and other issues related to the case ... but she was extradited to Florida after her arrest, which included a teary-eyed mug shot.
Remember ... Courtney told police she fatally stabbed Christian with a knife in their Miami condo, but claimed it was in self-defense. Her lawyer, Frank Prieto, also claims Courtney is a victim of domestic violence and human trafficking.
As we first told you ... Christian's family believes Courtney killed Christian in cold blood, and they want her to spend the rest of her life behind bars.
In any event, Courtney's case is just getting started ... and it will be interesting to see where it leads.