Mackenzie Shirilla, who killed her boyfriend and a friend by crashing a car into a brick wall at nearly 100 mph in 2022, has been the source of significant controversy following the release of The Crash — a Netflix documentary about the case.

But what do those who know Shirilla best say about the woman convicted of murder, currently serving two sentences of 15 years to life in prison?

Shirilla was 17 years old when she was driving Dominic Russo, 20, and his friend, Davion Flanagan, 19, back from a party in July 2022.

At around 5 a.m., Shirilla accelerated and slammed the vehicle into a brick wall in Strongsville, Ohio. Both Russo and Flanagan were killed.

In the ensuing months, investigators learned that Shirilla intentionally sped up, discovering that the accelerator had been pressed down and that there was no sign of braking.

She was eventually charged with murder in both victims’ deaths and convicted.

Shirilla’s attorneys claimed in her defense that she had passed out as the result of postural orthostatic tachycardia syndrome (POTS), but there was no proof of a diagnosis or any supporting evidence presented at her trial.

In The Crash, several of Shirilla’s friends and supporters suggest she is innocent, backing her claim that she blacked out before the crash. But not everyone believes her — including Rachel Anderson, who said she used to be friends with Shirilla.

“Mackenzie, she wanted the likes, she wanted the followers, she wanted to be at the top,” Anderson claimed on the podcast Mean Girl Murders, as previously reported by PEOPLE. “Mackenzie gets what she wants, Mackenzie is never punished and now Mackenzie is punished, and there’s nothing Mackenzie or her family can do.”

Another classmate, Jaina Maynard, claimed on the podcast that Shirilla was “terrible to people.”

The Crash featured text messages, which referenced claims that Russo had cheated on Shirilla. Friends said that as a result, the couple had trust issues.

In a recording made by Russo, which was also featured in the documentary, Shirilla was seen threatening him.

Following her conviction, she was sentenced to two concurrent sentences of 15 years to life in prison.

Kat Crowder, who spent six months behind bars with Shirilla, previously told PEOPLE that the now 21-year-old did not show signs of remorse.

“From my observations of her in prison, she never had any behaviors that mirrored that of someone who was remorseful,” Crowder said. “Full face of makeup, bright accessories and laughing constantly. Of course I don’t know what was going on in her mind but from the way she acted and carried herself, remorseful was the last thing she gave off.”

Shirilla will be eligible for parole in 2037.