Adacia Avery Chambers was charged with four counts of second degree murder on Sunday, after she crashed into a crowd of spectators at the Oklahoma State University homecoming parade.
Chambers who was arrested after the incident on Saturday, had several charges filed against her by the Payne County district attorney, said the Stillwater Police Department.
Authorities have reported that the woman was driving under the influence of alcohol, however, her attorney Tony Coleman denied the allegations and noted that she did not appear to be someone in a “drunken stupor.”
"She doesn't remember a whole lot about what happened. There was a period where I think ... she could have even blacked out," he added.
Police are currently waiting on her blood test results, which will help determine if she was intoxicated at the time.
Chambers will appear in court on Monday and if convicted could be sentenced to life in prison, police reported.
Meanwhile, the families of the deceased victims mourned the loss of their loved ones.
The victims killed in the crash have been identified as, Nakita Prabhakar Nakal, 23, MBA student from India who was enrolled at the University of Central Oklahoma in Edmond and a married couple, Bonnie Jean Stone and professor of agricultural engineering, Marvin Lyle Stone, both 65, from Stillwater.
The university announced that an employee, Nicollete Strauch survived the crash, but her 2-year-old son Nash, was killed.
Chambers is said to have driven her 2014 Hyundai Elantra into a police motorcycle, before plowing her car into a crowd of spectators at 10:31 am local time.
The crash occurred hours before the schools centerpiece homecoming event, a football match between the nationally ranked OSU Cowboys and the University of Kansas.
According to a witness, a horrific scene emerged as bodies flew up into the air due to the impact and landed on the ground.
While four people lost their lives at the scene, dozens of others were injured - 5 critical - including 9 children under the age of 10.