The field of crime fiction in Nigeria remains under-explored in scholarly discourse. This lacuna is particularly notable given the absence of comprehensive academic works dedicated to this genre. Crime fiction, which delineates narratives surrounding criminals, their crimes, detection and investigation processes, and underlying motivations, has been a prolific subject in Nigerian creative literature. Despite the substantial body of Nigerian literary works delving into themes of crime, punishment, and motivation, it is intriguing that the genre has not garnered significant critical analysis. This study adopts a diachronic approach to trace the historical evolution of crime fiction in Nigeria. It further investigates various sub-genres within this literary category and examines how a multitude of socio-political dynamics have influenced the thematic focus of Nigerian crime fiction. The study posits that crime fiction is gaining relevance in contemporary Nigerian society. It reveals that a significant corpus of these narratives grapple with issues such as colonialism, militarism, corruption, government apathy towards human and national development, and other opaque political and economic elements that perpetuate Nigeria’s precarious journey towards democratic stability.