The word traficabas is the imperfect form of traficar in the second person singular. There are other translations for this conjugation.
See the full traficar conjugation

traficar

Y dentro estaba esto, lo cual traficabas a bordo Nada de eso es mio Me pregunto que nos diría una prueba de Adn de las celulas de piel en esta almohada?
And laced inside that was this, which you smuggled aboard. None of that stuff is mine. I wonder what a DNA test of the skin cells on that pillow would tell us.
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