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Sam delays the Ring-killing laser for seven hours with technical sabotage until Ashford summons her to command and executes her without warning or trial.
Sam remains in occupied engineering and turns every stage of the Communications Laser modification into plausible delay. She cites safety overrides, targeting misalignment from the catastrophe, short-loop errors, reactor safeguards, new breakers, replacement cabling, and slow fabrication. Beneath those explanations she builds weak points meant to fail every attempt, buying the hidden resistance far more time than her first estimate.
After seven hours, Ashford orders Sam and acting second Anamarie Ruiz to command. Sam continues protecting the delay, estimating six more hours because the reactor cannot safely supply the needed output. Ruiz disagrees and proposes conductive foam in two. Ashford draws a pistol and shoots Sam above the right eye before her surprise can become speech. In the weightless bridge, her blood forms a red sphere and smaller orbiting droplets while guards tape her body and vacuum away evidence. Ashford calls her a saboteur; the accusation is true, but no trial, defense, or necessity separates his execution from murder. Sam dies having converted technical indispensability into roughly seven hours of survival for everyone she tried to protect.
Sam is a pretty Belter woman with a heart-shaped face, pixie-cut red hair pulled into a grease-streaked bun, one eye previously flooded red, and an engineer's worn work clothes.
Sam is the murdered chief engineer whose covert faults and repeated delays give the resistance its narrow window to stop Ashford.