Authorities have just charged Gabe McDonald's sister in the case of their parents murder back in March.

According to NewsWest 9, Grace McDonald has just been charged with conspiracy to commit capital murder and capital murder for the shooting deaths of her parents, James and Jana McDonald back in March.

Gabe McDonald is currently undergoing a medical examination after a judge determined he is not competent to stand trial after he was indicted for the murder.

Grace McDonald was arrested in Arizona last week after new details were discovered in the shooting death of her parents and she will be extradited back to Odessa this week.