A Maui woman locked up for murder is ordered to be released – but instead is kept behind bars.

Alexandria Duval was in court for her preliminary hearing on Wednesday, charged with the murder of her twin sister Anastasia. She should have walked out as a free woman, but that did not happen.

"Probable cause proceeding is a bare bones case by the prosecution,” said Myles Breiner, Criminal Defense Attorney. “It’s not a jury trial. It’s just putting out enough evidence to establish there was a crime."

Prosecutors believe Alexandria meant to kill her twin on the Hana Highway. The women were reportedly seen violently arguing moments before the deadly crash.

In the courtroom, Judge Blaine Kobayashi heard from officers who were first on the scene and saw what happened to Anastasia.

"She was bleeding from the face and unresponsive and didn't have a pulse,” said Chase Bell, MPD.

Alexandria was also injured when the SUV she was driving slammed into a rock wall and plummeted 200 feet off the cliff, but she was airlifted out.

Along with piecing together witness statements, police also used data from the SUV's black box and were able to detail what happened just before the crash.

"The initial speed of the vehicle 5 seconds before the airbags deployed was 25 mph that increased over 5 seconds to 40 to 48 mph when the air bags were deployed," said Lawrence Becraft, MPD.

After listening to the attorneys, witness and police the judge took a ten minute recess, then decided there was not enough evidence to prove probable cause that Alexandria murdered her sister and ordered her to be released.

“You have to show intent. It is a specific intent crime you have to show was it reckless, deliberate, knowing, intentional… and it is very difficult to establish that based on the facts and circumstances,” said Breiner.

Even though the judge ordered Alexandria to be discharged, she remained in custody after the hearing because she faced charges from a previous disorderly conduct arrest.

According to the Associated Press, Alexandria's attorney tried to bail out his client because she wants to travel to upstate New York in time for her sister's funeral.

Even though the judge determined there was not enough evidence for the murder charge, prosecutors can still charge Duval with lesser offenses like manslaughter or involuntary homicide.