ODESSA, TX (KWES) - New details have been released following a March 2016 shooting that left two Odessa parents dead.
Grace McDonald, the sister of Gabe McDonald, was arrested in Arizona this week.
According to Ector County District Attorney Bobby Bland, Grace is charged with conspiracy to commit capital murder and capital murder.
Gabe McDonald was indicted on capital murder charges in connection with the death of James and Jana McDonald.
Currently, Gabe is awaiting a medical examination after a judge determined that he's not competent to stand trial since he does not understand the court system.
Justin Low, who is Gabe McDonald's attorney, said Gabe doesn't understand the prosecutor, the jury or the lawyer's position on a significant level.