Fernandez is the second husband of Bridegan's ex-wife, Shanna Gardner-Fernandez, 35, who remains a suspect in the case.
The accused killer briefly appeared in the Duval County Courthouse Thursday wearing an orange jail-issued jumpsuit after he was extradited to Jacksonville.
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Mario Fernandez and his wife, Shanna Gardner-Fernandez, on vacation in Hawaii. The photo was posted to a family blog the day Fernandez allegedly murdered his wife's ex-husband, Jared Bridegan. (So Shelli )
Gardner-Fernandez's parents, Shelli and Sterling Gardner, own a multimillion-dollar multi-level marketing company based in Utah.
Fox News Digital obtained an email the company sent Wednesday to "leaders" who sell their paper-craft products.
"Stampin' Up! is aware that Mario Fernandez, Shanna Gardner's current husband, has been arrested in conjunction with an ongoing investigation," the statement says. "Shanna (Shelli and Sterling's daughter) and Mario have been separated for an extended period of time. We have no further details about the situation other than what has been reported in the media."
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Bridegan's widow, Kirsten Bridegan, slammed the statement in an Instagram story on her "Justice4JaredB" account.
A family portrait of Jared and Kirsten Bridegan. (Infinite Focus Photography/Madeline Insignares)
"No mention of Jared's name, no condolences, distancing Shanna from Mario, and a minimization of the charges brought against Mario," she wrote, adding that more than two dozen photos featuring Gardner-Fernandez and Fernandez remain on Shelli Gardner's blog, "So Shelli," which is used to promote the company.
A blog post that went up the day of Bridegan's murder titled "Time in Kauai" features photos from a family vacation with the elder Gardners – including seven snaps of Gardner-Fernandez and her husband.
Mario Fernandez makes his initial appearance at the Duval County Courthouse March 23, 2023, on murder and other charges for the fatal shooting of Jared Bridegan. (Fox News Digital)
Days later, at a memorial for Bridegan, with whom Gardner-Fernandez shares 10-year-old twins, the pair were photographed together.
Gardner-Fernandez and Fernandez are shown beaming in photos from the commemoration, which was held after she claimed she was barred from her ex's funeral, according to the March 21, 2022, blog post.
Mario Fernandez and his wife, Shanna Gardner-Fernandez, smiling at a memorial for her slain ex-husband, Jared Bridegan, with whom she shares 10-year-old twins. Fernandez has been charged with Bridegan's murder and Gardner-Fernandez remains a suspect. (So Shelli)
"Smug and happy at a ‘memorial’ for Jared after he was MURDERED," Kirsten Bridegan wrote on Instagram under a screenshot of the photo.
"And of him with Shanna, Shelli, and JAREDs KIDS smiling and laughing just weeks after his death," she wrote of a March 24, 2022, post that includes photos of the couple vacationing with the elder Gardners at Club Med Sandpiper Bay in Port St. Lucie, Florida.
The blog showcases photos of the family's extravagant vacations at luxury resorts, the company's papercraft products and Stampin' Up events.
Shanna Gardner-Fernandez, the daughter she shares with slain Microsoft executive Jared Bridegan, and her husband, Mario Fernandez, on vacation at Club Med Sandpiper resort in Port St. Lucie, Florida. The family vacation was taken weeks after Bridegan was allegedly murdered by Fernandez. (So Shelli)
By September, Fernandez no longer appeared in vacation photos on the blog. Shortly after the murder, he moved out of the home he co-owns with Gardner-Fernandez in Jacksonville Beach – a few miles from the crime scene.
Amid mounting public scrutiny over the slaying, Gardner-Fernandez moved cross-country to West Richland, Washington, in to a $1 million home her parents secretly purchased for her using an LLC, Fox News exclusively reported.
From left to right, Mario Fernandez, Sterling and Shelli Gardner and Shanna Gardner-Fernandez. The twins Gardner-Fernandez shares with her slain ex-husband Jared Bridegan are shown with their faces blurred. Fernandez is charged with Bridegan's murder. (So Shelli)
Bridegan, 33, a software developer for Microsoft, was shot to death in an affluent suburb of Jacksonville Beach after he stepped out of his car to move a tire from the road.
Bexley, one of two daughters he shares with Kirsten Bridegan, was strapped in her car seat. The doting father had just dropped off his twins at Gardner-Fernandez's house after taking them for dinner and was on his way home.
Mario Fernandez, right, is charged with the murder of Jared Bridegan, left. He is the second husband of Bridegan's ex-wife, Shanna Gardner-Fernandez, far right. (GoFundMe/Instagram)
Gardner-Fernandez and Bridegan had an acrimonious divorce in 2015 and continued to battle over custody of their twins and finances until his death.
The first arrest in the case came in January when police charged Henry Tenon, 61, who has pleaded guilty to the killing as part of a cooperation agreement.
Tenon, who rented a home from Fernandez at the time of the slaying, admitted to investigators that he pulled the trigger.
Haley Chi-Sing contributed to this report.