Marcus notes that, “Holding in the secret had dirtied me, soiled my spirit.” What does he mean by this? And do you think this is something the DHS would have intended?

Marcus knows the secret illegal activities: his new sense of self-awareness and social-justice makes him angry and sick that the government is taking away people's freedoms. I don't think the DHS really care about this. They are a huge organization with a specific mandate.