A ledger's ink, a ladder's grain, a truck axle's stamp; a manifesto's cadence, a purple floppy's metadata, a sneaker's worn lug; microspheres of factory paint, a rental slip's timestamp, a page's yellow microdots; a hotel teapot's residue, two orange "black boxes" from the abyss, a door handle's invisible cells-twelve ordinary objects that refused to forget. Evidence Locker follows twelve landmark investigations in which a single physical item anchored the arc from confusion to clarity. Each chapter shows how disciplined observation, careful preservation, and methodical analysis can turn things into evidence-and evidence into truth.From Capone's ledgers and the Lindbergh ladder to the Oklahoma City axle and the Unabomber manifesto; from BTK's floppy and the Night Stalker's Avia sole to Green River's paint dust and a Connecticut woodchipper receipt; from printer microdots and a polonium-tainted teapot to AF447's raised recorders and the Golden State Killer's door-handle swab-the book distills what these cases teach: facts live in materials, marks, codes, chemistry, and context. Plain objects, handled well, outlast rumor.