WIFE’S AFFAIR WITH PORN STAR LEADS TO HUSBAND’S MURDER
FABIO AND MONICA SEMENTILLI - SHE HAD AN AFFAIR WITH A PORN STAR - HE WOUND UP MURDERED
BY SNN.BZ STAFF
A Deadly Affair: The Monica Sementilli Murder Case
In a case that captivated Los Angeles and shocked the beauty industry, Monica Sementilli, the wife of renowned hairstylist Fabio Sementilli, was convicted of orchestrating his brutal murder in a plot fueled by infidelity, greed, and betrayal. The sordid tale of a torrid affair with a former adult film star, Robert Louis Baker, culminated in a 2017 stabbing that left a family shattered and a community reeling. This is the story of a love triangle turned deadly, unraveling in a courtroom over eight years later.
A Life of Glamour and Secrets
Fabio Sementilli was a superstar in the world of hairdressing. Hailing from Toronto, Canada, he rose to prominence styling the locks of Hollywood icons like Jennifer Lopez and Russell Crowe. As vice president of education for Wella, a leading haircare company, Fabio, known as “Big Daddy” to friends and colleagues, lived a life of success with his wife Monica and their two teenage daughters in a luxurious Woodland Hills home. The couple, married for nearly 20 years, appeared to have it all—a gated house, a Porsche in the driveway, and a seemingly loving family. But beneath the surface, Monica was cultivating a secret life that would unravel everything.
Monica, who had relocated to Los Angeles from Toronto with Fabio in 2007, found herself restless. Despite the couple’s comfortable lifestyle, she was bored. At West Hills LA Fitness, she met Robert Baker, a racquetball coach with a checkered past as a convicted sex offender and former adult film actor. Described by a friend as “dirty sexy,” Baker became Monica’s lover, sparking an affair that lasted over a year before Fabio’s death. Their relationship was intense, marked by explicit photos, secret rendezvous, and even “swinging” with others, according to prosecutors. Monica, bound by her Italian Catholic upbringing where divorce was not an option, saw Baker as her ticket to a new life—one that prosecutors alleged required Fabio’s elimination.
A Murder Staged as a Robbery
On January 23, 2017, Fabio Sementilli was found dead on the patio of his Woodland Hills home, stabbed seven times in the neck, chest, and thigh. His 16-year-old daughter, Isabella, discovered his bloodied body and called 911 in a desperate attempt to save him. Initially, police suspected a botched home invasion, as the master bedroom was ransacked, and Fabio’s 2008 Porsche 911 was stolen, later found abandoned five miles away. An $8,000 Rolex remained on Fabio’s wrist, casting doubt on the robbery motive.
Investigators soon uncovered evidence pointing to a more sinister plot. Blood at the crime scene and inside the stolen Porsche was linked to Robert Baker. A neighbor’s security camera captured two hooded figures jogging near the Sementilli home around the time of the murder, one identified by prosecutors as Baker. The home’s security DVR, which Monica had instructed Baker on how to locate, was missing, suggesting an inside job. Further investigation revealed Monica’s affair with Baker, and suspicions grew that she was the mastermind behind her husband’s death.
A Web of Deception
Prosecutors alleged Monica and Baker conspired to kill Fabio to collect a $1.6 million life insurance policy and continue their affair without the complications of a divorce. On the day of the murder, security footage showed Monica leaving home in her Ford F-150 and heading to a Target store, allegedly to establish an alibi. While there, she was seen fixated on her phone, which phone records indicated was connected to her home’s IP address, consuming data consistent with streaming live video from the home’s security cameras. Prosecutors argued she was monitoring the scene to ensure Baker and an accomplice, Christopher Austin, a former Oregon probation officer, could enter and kill Fabio without interruption.
The affair continued even after Fabio’s death.
Prosecutors presented evidence of Monica sending explicit photos to Baker during Fabio’s funeral in Toronto, with one image showing her wedding ring still on her finger. The pair exchanged hundreds of messages via the encrypted Viber app, including 95 on the day of the murder. In jail, their relationship persisted through clandestine “kite” messages and three-way calls facilitated by a third party. One particularly shocking detail emerged: Baker sent Monica a toothpaste tube containing his semen, and she allegedly shaved his initials into her pubic hair, calling him “master” and “maestro.”
The Trial and Conviction
Monica Sementilli and Robert Baker were arrested in June 2017, five months after the murder, and charged with murder and conspiracy. Baker pleaded no contest in July 2023 to first-degree murder and conspiracy, admitting to the special circumstances of murder for financial gain and lying in wait. He was sentenced to life without parole. During Monica’s trial, which began in January 2025, Baker testified that he acted alone, claiming he killed Fabio because he “wanted her” and that Monica had no involvement. However, his testimony was undermined by inconsistencies and a seven-page letter he wrote to Monica, which prosecutors argued contained coded language to maintain their secrecy pact.
Christopher Austin, Baker’s accomplice, pleaded guilty to second-degree murder and testified that Baker had told him Monica wanted Fabio “gone.” Austin claimed Monica left the door unlocked, allowing them to enter the home. Despite never speaking to Monica directly, Austin noted that Baker’s actions followed text messages, suggesting Monica’s coordination.
Monica’s defense, led by attorney Leonard Levine, argued that her only crime was adultery, not murder. Levine portrayed Baker as a manipulative “Svengali” who deceived Monica, emphasizing that no direct evidence—texts, calls, or statements—showed her planning the murder. The defense highlighted the prosecution’s focus on the affair’s lurid details as a distraction from the lack of concrete evidence tying Monica to the conspiracy.
After a 10-week trial and three days of deliberation, a jury convicted Monica on April 11, 2025, of first-degree murder and conspiracy, with special circumstances of murder for financial gain and lying in wait. On June 23, 2025, Los Angeles County Superior Court Judge Ronald Coen sentenced her to life without parole, calling her the “mastermind” of a “brutal, well-thought-out slaughter” and dismissing the defense’s bid for a lesser sentence. Fabio’s sisters, Mirella and Loretta Picillo, expressed relief, stating that Monica’s “calculated cruelty” had betrayed their family. Monica’s daughters, Isabella and Gessica, pleaded for leniency, describing their parents as loving, but prosecutors dismissed their support as a result of Monica’s manipulation.\A Family Torn Apart
The Sementilli case is a tragic tale of betrayal that destroyed a family. Fabio, remembered as a vibrant mentor and devoted father, was mourned by thousands in the beauty industry. Monica, once a devoted wife and mother, now faces life behind bars, her affair with Baker exposed as a motive for murder. Baker, serving his own life sentence, continues to claim Monica’s innocence, though their relationship reportedly ended with her cursing him as a murderer in a jailhouse encounter.
The case, featured on “48 Hours” and NBC’s “Dateline,” serves as a chilling reminder that behind a facade of glamour and success, dark secrets can lead to devastating consequences. As Los Angeles County District Attorney Nathan Hochman stated, “Monica Sementilli betrayed the person who loved and trusted her most. Her calculated scheme to profit from her husband’s death cost a kind and talented man his life and devastated a family.”
