Kylie Rae Harris is at fault in the three-car accident last Wednesday that killed the singer and a 16-year-old woman. Officials say both speed and alcohol were factors in the fatal accident, though they are awaiting a toxicology report to confirm details.

Harris and 16-year-old Maria Cruz of San Cristobal, N.M., were killed on Wednesday evening around 9PM local time in the accident that also involved a third, unidentified and uninjured driver.  
 
Harris was driving south on State Road 522 in a black 2017 Chevrolet Equinox when she clipped the back of a black Chevrolet Avalanche, driven by the unidentified third driver. That caused Harris' vehicle to move into the northbound lane of the road and hit Cruz's white 2008 Jeep head on. The Taos County Sheriff's Office says that all three drivers were wearing seatbelts.

Court records show Harris had a 2017 DWI conviction in Collin County, Texas, after which she was ordered by the court to install an ignition interlock device in her car to prevent her from driving while intoxicated. Although Harris' mother tells People that her daughter had driven "11 or 12 hours that day" and was likely "exhausted," she also notes alcohol is "something [Kylie] struggled with on and off over the years." 

Because Harris died in the crash and there'sno rush to press criminal charges.  Officials say the toxicology report could take "several months up to a year."