The CWA Diamond Dagger is a prestigious award presented by the Crime Writers' Association (CWA) in the United Kingdom. It honors an author for their outstanding contribution to the genre of crime writing, recognizing both their body of work and influence on the field. The award is typically given to authors who have published multiple works and have made a significant impact on crime literature. Established in 1986, the Diamond Dagger is one of the highest accolades in crime fiction. Recipients include notable authors such as P.D. James and Lee Child, highlighting their achievements and dedication to storytelling. The award is presented annually at the CWA's Dagger Awards ceremony.