Alexandria Duval has been charged with second-degree murder in the death of her twin sister Anastasia Duval, who died Sunday in a single-car crash on Maui, the police department said Tuesday.

Alexandria Duval was arrested Friday morning and is being held without bail.

Police suspect she is the driver of a white 2016 Ford Explorer involved in the dramatic crash over a cliff off of Hana Highway and onto the rocky shoreline 200 feet below.

The investigation has been referred to the prosecutor’s office.

News of the crash has gone viral after witnesses said they saw the 37-year-old sisters fighting in the SUV shortly before the vehicle went off the road, through a rock wall and over the cliff, CBS News reported.

Anastasia Duval was pronounced dead at the scene, and Alexandria Duval was injured. Both sisters, who used to run a yoga studio in Florida, have criminal records, including public intoxication, disorderly conduct and terroristic threatening, the story says.

Alexandria Duval pleaded not guilty Monday.

Police are investigating the possible involvement of speed, drugs and alcohol.

This is Maui County’s eighth traffic fatality for 2016, compared to four at this time last year, police said.