The quote from Gregg Olsen's "Heart of Ice" immediately sets a dark and unsettling tone, evoking a chilling narrative submerged in cold motives and grim deeds. It juxtaposes two stark actions — committing a violent crime and the mundane act of going to a fast-food chain, Arby's — which amplifies the disturbing nature of the scene. This contrast highlights how shocking and normalized evil can sometimes appear when juxtaposed with everyday life.

From a literary perspective, this line encapsulates the themes of deception, cruelty, and detachment that often permeate true crime or suspense genres. The casual mention of an apparently trivial activity like going to Arby's right after a grim act makes the character's psyche notably complex and unsettling, possibly hinting at sociopathy or profound moral dissonance. It suggests how perpetrators can compartmentalize their heinous acts, continuing with almost mundane routines that starkly contradict the severity of their actions.

Emotionally, it provokes discomfort in the reader, making them confront the darker facets of human nature — where horror and normalcy bizarrely intersect. It also raises questions about the incapacitation of empathy and conscience, pushing the reader to reflect on the terrifying possibilities when moral constraints deteriorate. Additionally, it challenges us to think about how sensationalized or desensitized we've become to violence when it's casually mentioned alongside trivial everyday events.

Overall, this quote is powerful in its brevity and shock value, effectively capturing a grim narrative moment that sets the tone for the rest of the story, compelling the reader to delve deeper into the motivations and psychological depths of the characters involved.