Ludlow figures out that Santos were selling drugs .
Ludlow is also piecing together the puzzle as he goes ; he eventually learns that he has been a pawn in a plan masterminded by Captain Wander and he also learns that is was Demillie and Santos that were selling drugs to the two criminals who killed Washington and Disco all along and it also turns out that Ludlow 's unit have been collaborating with the two criminals all along .