A Shocking True Crime Tale: How One South Florida Grandmother Became the Epicenter of an 11-Year Murder-for-Hire Conspiracy
Picture this: A seemingly ordinary morning in Tallahassee, Florida, where a dedicated law professor drops off his young kids at preschool and heads to the gym, only for his life to end in a hail of gunfire upon returning home. Now, imagine learning that his own mother-in-law orchestrated a plot to make it happen, spanning over a decade of legal battles and revelations. This is the gripping, heart-wrenching story of Dan Markel's murder—and trust me, it's one that will leave you questioning everything you think you know about family, control, and justice.
Dan Markel's final day unfolded like so many before it. He drove his two young sons to preschool and hit the gym, as reported by investigators. But tragedy struck when he pulled into his driveway on July 18, 2014. Markel was shot multiple times in the head and rushed to a hospital, where he succumbed to his wounds the following day, authorities confirm. This brutal killing set off a chain of events that would unravel a web of deceit involving his ex-wife's family—a saga that would stretch across 11 years, multiple criminal trials, and shocking allegations of a murder-for-hire scheme.
And this is the part most people miss: The roots of this crime dig deep into personal conflicts, especially Markel's custody disputes with his ex-wife, Wendi Adelson. Their divorce was anything but amicable, with the future of their two children at the heart of heated battles. Wendi, who hailed from a well-known dentistry family in South Florida, had married Markel in 2006 after meeting through a Jewish dating service. But their union faced challenges, not least from Wendi's mother, Donna Adelson, who prosecutors described as a domineering force in her daughter's life.
Prosecutor Sarah Katherine Dugan testified in court that Donna was intensely involved in every corner of Wendi's world. "She exerted extreme control," Dugan explained, "with firm views on her career choices, relationships, and even big decisions like buying a home." Wendi and Dan relocated to Tallahassee, where both secured positions at Florida State University's law school. Yet, their marriage crumbled after the kids arrived, as Wendi shared in a 2015 podcast: "Our relationship fell apart once the children came along, overwhelmed by the isolation of feeling undervalued as an equal partner."
Post-divorce, the couple clashed fiercely over custody. Donna launched an aggressive push to bring the children and Wendi back to South Florida, but Markel stood firm on keeping them in Tallahassee—over 500 miles away. This bred deep mistrust; Markel even sought a court order in 2014 to bar Donna from unsupervised visits with the kids. Tragically, it was the last legal action he took before his murder.
Fast-forward two years after the killing, and investigators made arrests in 2016, charging Sigfredo Garcia and Luis Rivera with first-degree murder. Prosecutors claimed these men were paid assassins hired to eliminate Markel. Rivera, in a plea deal that reduced his charge to second-degree murder and landed him 19 years behind bars, implicated Katie Magbanua as the one who recruited them. Magbanua, the mother of Garcia's child and ex-girlfriend of Wendi's brother Charlie Adelson, was arrested that year and later joined Charlie in facing charges of first-degree murder, conspiracy to commit murder, and solicitation to commit murder.
But here's where it gets controversial: Prosecutors painted Donna and Charlie as the masterminds, allegedly driven by the custody feud with Markel. They supposedly enlisted Magbanua, Garcia, and Rivera to carry out the hit. For beginners wondering what "solicitation to commit murder" means, it's simply the act of asking or encouraging someone to commit a killing for hire—essentially plotting and paying for another's crime. Magbanua and Charlie both entered not guilty pleas but were convicted on all counts in 2022 and 2023, respectively, receiving life sentences plus extra time (60 years for Charlie) for their roles in the conspiracy.
Garcia, who also pleaded not guilty, faced similar charges and was sentenced to life in prison in 2019. Then, after Charlie's trial, a bombshell: Donna planned to flee to Vietnam—a nation without an extradition treaty with the U.S.—on a one-way ticket. She was apprehended at Miami International Airport in 2023 and charged with the same offenses. Donna denied involvement, claiming she had nothing to do with the plot. At 75 years old, she was convicted on all counts in 2025, earning a life sentence with an additional 30 years for the solicitation and conspiracy charges, to be served back-to-back.
At her sentencing, Donna expressed remorse: "I would never have wished harm or death on Danny, nor could I bear to leave these two little boys fatherless." In a fresh interview with "20/20," juror Evan Higginbotham reflected on the trial: "The prosecution amassed an extensive array of evidence, and it was their skillful presentation that ultimately convinced me of her guilt." Dan's mother, Ruth Markel, shared her pride in her son's legacy: "Danny was an exceptional dad. Amid all his achievements, I'm most honored by what a wonderful father he was."
This case has sparked intense debate. For instance, some argue that Donna's controlling nature doesn't equate to murder plotting—could she have been unfairly targeted in a family feud gone wrong? Others question the evidence's strength, especially with multiple appeals in play. Donna and Charlie have filed appeals for their convictions, while Magbanua's and Garcia's were denied in 2025, as detailed in court records.
The full story unfolds in a new "20/20" episode titled "Meddler or Murderer?" airing January 2, 2024, at 9 p.m. ET on ABC, with streaming available the next day on Disney+ and Hulu. For more insights, tune into the "20/20: The After Show" podcast Mondays, hosted by co-anchor Deborah Roberts.
What do you make of this? Was Donna Adelson truly the villain in a calculated crime, or a misunderstood matriarch caught in a whirlwind of family drama? Do the convictions feel just, or do you suspect there's more to uncover? Share your opinions in the comments—let's discuss!
