Tide Numbers Scrap: How a Cereal-Box Code Saved a Kidnap Victim
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A tiny four-inch square torn from a cereal box, pushed through a crack at the base of a boat hull, carried a binary code and a tide table that led police to a missing teacher. The scrap was found at Calloway Marina on November 4, 2011 - and it would be the key to locating Mark Tucker. How did those numbers point investigators to the exact boat and the timing that saved his life?
In this episode, we tell how a routine service call and one technician’s habit of photographing evidence connected a locked bicycle at Linden Prep to a forty-two-foot boat less than three hundred feet away, and how a tidal analyst decoded the cardboard to answer the question that began the case.
Person: Mark Tucker
Date: November 4, 2011
Location: Calloway Marina
Event: cardboard with tide table and binary code found
Status: missing person linked to boat
- Scrap size: approximately four inches square torn from a cereal box.
- Discovery time: photographed by Debra Griffin after arriving at 7:14 AM.
- Bicycle found: at Linden Prep at 8:00 AM, locked and helmet hanging.
- Distance: boat was moored less than 300 feet from where the bicycle stood.
- Analyst ID time: tidal analyst Robert Ames identified the tide-table format the following morning.
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