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24 Hours in Police Custody Spotlights DNA That Solved Una Crown’s Murder

The film underscores how new testing rescued a case damaged by an early police error.

Overview

  • Channel 4 aired a two-part 24 Hours in Police Custody special on Monday and Tuesday, retracing the cold-case work that linked local handyman David Newton to the 2013 killing of Una Crown.
  • Scientists extracted DNA from Crown’s preserved fingernail clippings, and detectives then eliminated men in Newton’s paternal line to firm up the match.
  • Officers first labeled the death non‑suspicious, so the home was not sealed and key traces were disturbed, with relatives allowed back in and a paramedic’s touch moving blood onto a light switch.
  • A jury found Newton guilty in February 2025, and the judge gave life with a 21‑year minimum after finding he used a copied back‑door key and stole £80 following the attack.
  • The documentary includes custody footage of Newton boasting about the nickname “The Shovel”, and it shows how modern DNA methods can unlock long‑stalled investigations.