“In the world of Hammett’s fiction, one can experience freedom only at
the cost of someone else’s limitation, and autonomy itself becomes
therefore a kind of compulsion: whatever feeling Spade may have for
Brigid —and it is part of the strength of Hammett’s novel to suggest
that he experiences more than a fleeting attraction—he must arrest
her and his own desire in order to remain free” (McCann 90).
McCann expresses that in Hammet’s works, freedom is experienced by treading over someone else’s. Though Spade is in love with Brigid, he still has to turn her in for the murder of Archer. He has to “arrest his own desire” to make the correct choice and apprehend her because it is the law. Morality is presented in this context because Spade has to choose between his sense and sensibility; the conflict is between his good judgment of putting a killer away and his emotions and attraction to Brigid.