DID A 75-YEAR-OLD GRANDMOTHER PUT A HIT OUT ON HER OWN FORMER SON-IN-LAW? AN ALL-NEW '20/20' INVESTIGATES

'20/20' Correspondent Ryan Smith Shares the Latest Details in a Case That Shocked Florida for More Than a Decade on Friday, Jan. 2, on ABC, Streams Next Day on Disney+ and Hulu

Dan Markel was a prominent Florida State University law professor. But in 2014, he was found gunned down in his Tallahassee home. As authorities begin investigating his murder, they identify someone close to home as the possible mastermind behind the killing: Donna Adelson, Dan's former mother-in-law. Dan was embroiled in a bitter divorce and custody battle with Donna's daughter, Wendi, and prosecutors say this 75-year-old grandmother orchestrated an elaborate murder scheme. "20/20" has followed this case for more than a decade. Correspondent Ryan Smith brings viewers inside the twists and turns of this case, including the latest on the trial, verdict and murder that shattered a family and shocked the nation in "Meddler or Murderer?," an all-new "20/20," FRIDAY, JAN. 2, (9:00-11:00 p.m. EST), on ABC and streams next day on Disney+ and Hulu.

ABC News' "20/20" is the No. 1 award-winning primetime program anchored by David Muir and Deborah Roberts. A proven leader as a long-form newsmagazine for over 45 years, "20/20" features unforgettable, character-driven true-crime mysteries, exclusive newsmaker interviews, hard-hitting investigative reports, and in-depth coverage of high-profile stories. Janice Johnston is the executive producer. The two-hour "20/20" events air Fridays from 9-11 p.m. ET on ABC and are available to stream on ABC News digital platforms, Disney+ and Hulu.

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