Inmate who knew Mackenzie Shirilla: ‘She wanted to be like Regina George’

(NewsNation) — A former prison mate of Mackenzie Shirilla tells NewsNation she saw no signs of remorse while inside with the convicted killer. Shirilla was sentenced to 15 years to life in prison in 2023 after being found guilty of murder in connection with a crash that killed her boyfriend and another teenager inside her car. She was found guilty of four counts of murder in what prosecutors called an “intentional act.” Prosecutors say the evidence showed Shirilla, only 17 years old at the time, never showed any signs of slowing down. Shirilla’s boyfriend, 20-year-old Dominic Russo, and his friend, 19-year-old Davion Flanagan, were pronounced dead at the scene. Investigators say Shirilla, who was out for an early-morning drive with her boyfriend and another teenager in July of 2022, intentionally accelerated to 100 mph before slamming into a brick wall. A new Netflix documentary, "The Crash," has thrust Shirilla and the case back into the spotlight. "When Mackenzie first walked out in the documentary, my jaw dropped because that was not the person that I saw in prison when I was with her. She walked around in a very light demeanor," Kat Crowder, who spent six months in prison with Shirilla, said. "It was never this dark, smug, tough girl act that was in this video trying to portray some sort of remorse... from my observations, there was never any, you know, behaviors that looked like somebody who was remorseful," Crowder added. Crowder said other inmates told her Shirilla allegedly said she was high during the crash. "I do say that she wanted to be like Regina George. I mean, just the way that she did her makeup, the way that she, I mean, it was like she was going out to a club or something," Crowder added of Shirilla's disposition in prison.