The gold bar in question was gold-plated tungsten, with Mac observing tungsten and gold had the same density. Au is 19.3 g/cc and W is also about 19.3. [Of salted gold, see kitco: In October, the Hong Kong bankers discovered some gold bars shipped from the United States were actually tungsten with gold plating. AND
youtube AND Tungsten-Filled Gold Bar.]
An interesting lead in the story concerned the use of blue green algae (aka cyanobacteria) to color beer green, here for St. Patrick's Day. In the storyline, only one bar in NYC used this approach, which clue was quite helpful. [from wikipedia: One of Dogfish Head's more notable odd beers was a green beer called Verdi Verdi Good, produced in 2005 and sold only on draft. The beer was not colored green artificially; rather, the green color was derived from brewing a Dortmunder style beer that contained spirulina, or blue-green algae. AND from BrewBoard: You can try Spirulina a blue-green algae food supplement in bulk powder form added into a very light colored ale or lager recipe.
Ferromagnetic shavings were used to lift a serial number off a gun, which ultimately implicated the bartender (Finnegan) at the pub which used the blue green algae impregnated beer. There was a chase scene happening during the St. Patrick's Day Parade. [An earlier scene showed Central Park West with leaves on the trees, clearly an anachronistic shot. A later shot of Central Park also shows green-leaved trees. No leaves in March in NYC.]
One of the bloggers (Vandemann) lived near the Irish Hunger Memorial near Battery Park [Vesey Street and North End Avenue], which furnished clues in the case.
"They are going to boil you like cabbage."
"Salted gold." Electroplate tungsten with gold.
"Silence is golden."
Section 485. Counterfeiting precious metal.
Reed Garrett played by Kyle Gallner
Aubrey Hunter played by Madchen Amick
**In passing, from California law:
477. Every person who counterfeits any of the species of gold or
silver coin current in this State, or any kind or species of gold
dust, gold or silver bullion, or bars, lumps, pieces, or nuggets, or
who sells, passes, or gives in payment such counterfeit coin, dust,
bullion, bars, lumps, pieces, or nuggets, or permits, causes, or
procures the same to be sold, uttered, or passed, with intention to
defraud any person, knowing the same to be counterfeited, is guilty
UPDATE. cyanobacteria and the Geist Reservoir in Indiana