"The Crash" Documentary

12:23 PM PT -- Christine Russo joined us today on "TMZ Live" Wednesday, where she explained that Mackenzie's behavior is making a mockery out of their family's tragedy.

Mackenzie Shirilla is posting glammed-up prison selfies on Instagram ... but Dominic Russo's sister tells TMZ all she sees is a convicted killer soaking up attention online.

Mackenzie's new prison selfie and a message saying she's "trying to do better every day and holding on to hope" has Christine Russo demanding prison officials investigate whether she's improperly accessing social media behind bars.

Christine tells TMZ ... "As Dominic Russo's sister, it is heartbreaking to see someone convicted in connection with my brother's death appear to have a social media presence while our family is suffering every day. While my brother is buried, seeing her post selfies, full face of makeup, and bragging how she is famous is painful and, to me, completely inconsistent with remorse."

Mackenzie Shirilla is sharing a new photo from behind bars ... along with a positive message after suffering a legal setback.

Despite being locked up, Mackenzie's supporters are using her Instagram account. In a recent post, they uploaded a snap of her from prison, explaining she's "trying to do better every day and holding on to hope" ... despite a recent court decision denying her request for post-conviction relief.

Mackenzie's team explained the denial wasn't based on the substance of her claims. Instead, they said the filing was rejected because it was submitted one day past the deadline.

Mackenzie Shirilla isn't getting her day in court ... because her latest appeal was denied, TMZ has learned.

According to new court docs obtained by TMZ, Mackenzie's appeal was not accepted for review.

The papers say the judge dissented and the court declined to accept jurisdiction over the case. Basically ... they declined to hear the case and it was dismissed.

Mackenzie Shirilla should not be bored to tears anymore in prison, because she's finally landed a new job behind bars ... TMZ has learned.

That's right ... Mackenzie is now employed as a food service worker at the Ohio Reformatory for Women in Marysville ... this according to the prison's spokesperson, Tara Nickle.

As for how much she's making for the gig ... we're told Mackenzie's income is not a matter of public record per Ohio law, but, in general, inmates can make up to $24 per month.

The car Mackenzie Shirilla was driving when she crashed into a wall, killing Dominic Russo and Davion Flanagan, was listed as an asset in her parents' bankruptcy just a couple of months earlier ... TMZ has learned.

Mackenzie’s parents, Natalie and Steve, filed for Chapter 7 bankruptcy in May 2022, listing $398K in assets and $173K in liabilities.

According to the bankruptcy documents, one of their assets was a 2018 Toyota Camry, which was the same car involved in Mackenzie’s fatal car crash on July 31, 2022. The car, which apparently had 32,000 miles on it, was listed at $18K.

Steve Shirilla's contract for his teaching job has not been renewed, TMZ has learned. And Steve tells us he's the one who wanted out.

He told TMZ ... "I wouldn’t resign a contract with them for the simple fact of how they handled this situation… the school and the diocese showed their true colors…"

Steve also says, "I’m done talking about this or anything that’s not about the injustice my daughter has been put through my only focus is her."

Remember, Mackenzie Shirilla's dad had been put on leave after the Netflix documentary "The Crash" dropped ... because of comments he made about his daughter smoking weed.

Mackenzie Shirilla's mom, Natalie, has some harsh words for Dominic Russo's grieving family ... blasting them as "evil" in a conversation with her daughter.

TMZ obtained audio from a prison phone call between Mackenzie and her mother ... with Natalie telling Mackenzie her late boyfriend's family is full of "evil people."

Natalie's harsh comment came as the two rehashed court testimony from Mackenzie's murder trial.

At one point, you can hear Natalie say, "Dom would be beside his frickin' self" over what was said in court.

Mackenzie Shirilla is mocking her hometown as she rots in prison ... ripping the good folks of Strongsville, Ohio.

TMZ obtained audio from a prison call between Mackenzie and her mother, Natalie, mocking the community she once called home.

Give it a listen ... Mackenzie is heard complaining about residents of the Cleveland suburb ... describing Strongsville residents as "sad and depressing."

Mackenzie and her mother even suggest folks back home are spreading false information about Mackenzie online ever since she was arrested and convicted of murdering her boyfriend Dominic Russo and his friend Davion Flanagan.

Mackenzie Shirilla's dad was in full damage-control mode after her arrest ... repeatedly warning police not to question his daughter.

Body cam footage, obtained by TMZ, shows Steve Shirilla arriving at the Strongsville Police Department shortly after Mackenzie was arrested in November 2022 in connection with the crash that killed her boyfriend, Dominic Russo, and friend Davion Flanagan. Check out the video ... Steve yells about cops supposedly not being allowed to question his daughter as he demands to see her immediately.

At one point, an officer reminds him Mackenzie is legally an adult and can speak for herself. Steve's response? "Yeah, but she's a dumb 18-year-old."

Mackenzie Shirilla says she's bored to tears behind bars ... but she might want to get used to it, considering she's serving 2 concurrent life sentences.

TMZ obtained audio from a prison phone call between Mackenzie and her mom, Natalie, where the convicted killer complains about how slowly time is passing in lockup.

You can hear Mackenzie's annoyance ... she doesn't have access to her commissary and complains about having one book she doesn't want to keep reading over and over.

Gypsy Rose Blanchard is reacting to Mackenzie Shirilla having hookups and getting hickeys behind bars ... saying kissing women is one way to make the days go by.

Gypsy sat down with TMZ's Charlie Neff on The TMZ Podcast and told us Mackenzie Shirilla having girlfriends in prison is pretty standard, but it's good for one thing only ... passing time.

Check it out ... Gypsy says Mackenzie needs more than a hookup ... telling us it would do a lot of good if an older inmate took Mackenzie under her wing. After all, it worked for Gypsy.

Mackenzie Shirilla's clearly keeping Dominic Russo and Davion Flanagan close to her ... but not always in the most flattering way -- because she appears to be mocking their musicality in a prison phone call.

We've obtained audio from a call between Shirilla and her friends, Rosie Graham and Faith, in which she laments paying for a music streaming service while behind bars.

Mackenzie says the service is terrible ... untalented underground artists who at one point she describes as the "Davions and Doms of the world."

Mackenzie Shirilla is already thinking about life after prison ... and it sounds like she's got big plans for what might come next.

Take a listen ... TMZ obtained audio of Mackenzie chatting with her mom, Natalie, about  her future and a potential new purpose she sees for herself ... becoming a life coach.

Natalie tells her daughter she's been through an incredible amount and suggests those experiences could one day allow her to help others. Mackenzie, who is serving two concurrent sentences of 15 years to life, seems to embrace the idea.

Mackenzie Shirilla's legal troubles weren't the focus of one particular jail call with her mom ... her booty was.

In a recording obtained by TMZ, Mackenzie and her mother, Natalie, spend part of a conversation laughing over comments Mackenzie received after one of her court appearances ... with a friend apparently fixated on how she looked rather than what was happening in the courtroom.

Take a listen to the exchange ... Mackenzie reads a message from a woman named Kendra, who says she watched a livestream of the proceedings and immediately noticed something different when Mackenzie walked in.

Mackenzie Shirilla hasn't been a model prisoner in her last few years behind bars ... at least according to prison officials, who say she's committed a number of rule violations -- including several of a sexual nature.

We've obtained conduct reports about a bunch of alleged rule violations during Shirilla's time behind bars ... including altering prison clothes and possessing contraband.

For example, officials say they caught Shirilla with a prescription medication that wasn't hers in January 2025 ... as well as "a personal photo of herself containing drug use." In her statement on the incident, cops say Shirilla told them the photo didn't have drug use in it -- and insisted the pills they found with her were actually prenatal vitamins she got from someone else.