According to the Mail, marijuana residue and prescription pills were found littered throughout the car.
Knight, who had only had her license for four months, and her three passengers had planned on attending their junior prom on the day of the crash, but were all hospitalized.
At her arraignment on Thursday, Knight pleaded not guilty to charges including reckless operation and drug possession. She was released on the condition that she wear a GPS unit, give up her license and observe a 10 p.m. curfew.
She was also required to submit to random drug tests – and sources told CBS Boston that she tested positive for cocaine after her court appearance.
Police said they have a string of texts between Knight and others citing plans to ‘smoke some bowls’ and take Adderall, which was among the pills found in the car at the crash site.