Even in the days of Scarface or Miami Vice they weighed it by the kilo.
Miami what?
They probably reported the catch in lbs. because most American are ignorant about the weight of a kilo.
"Because AP style is primarily an American style standard, use of the imperial system of measurement is favored, although AP style does make allowances for the growing popularity of the metric system."
Measurements in AP Style | eHow
They would have gotten more mileage had they reported "360 Quarter Pounders Worth of Cocaine Found on Cargo Ship Owned By Anti-Drug Senator’s Family."
True, but I'm reminded of :
"when the A&W restaurant chain released a new hamburger to rival the McDonald’s Quarter Pounder. With a third-pound of beef, the A&W burger had more meat than the Quarter Pounder; in taste tests, customers preferred A&W’s burger. And it was less expensive...
...Misunderstanding the value of one-third, customers believed they were being overcharged. Why, they asked the researchers, should they pay the same amount for a third of a pound of meat as they did for a quarter-pound of meat at McDonald’s. The “4” in “¼,” larger than the “3” in “⅓,” led them astray."
http://www.nytimes.com/2014/07/27/magazine/why-do-americans-stink-at-math.html?_r=0