By Andrew Kariuki
The Directorate of Criminal Investigations (DCI),over time, has carried out a number of successful operations to stop the trade, distribution and production of narcotics in Kenya.It has however, never disclosed how they determine the “estimated street value” they mention in their social media pages, while reporting successful operations.
After many concerned citizens pointed this out ,the DCI, through a social media post, stated that through its Anti-Narcotics Unit (ANU), it uses a structured and evidence-based process to estimate the value of narcotic drugs seized during operations across the country.

According to standard investigative procedures, the valuation is primarily guided by three key factors: the quantity of the drugs recovered, the type of substance and prevailing street prices within Kenya’s illicit drug market.
The process begins with the physical weighing of the seized narcotics. Investigators measure the drugs in grams or kilograms, depending on the quantity recovered. This step is conducted in accordance with legal requirements and is typically documented through an official weighing certificate, which may be used as part of court evidence.
Once the quantity has been established, investigators calculate an estimated value based on current street prices. These prices are not arbitrary but are derived from intelligence gathered by law enforcement agencies through ongoing monitoring of drug trafficking networks, recent seizures and informant reports.
The estimated value reflects how much the drugs would likely fetch if sold in the illegal market, providing a benchmark used in both investigations and prosecution.
To support the valuation, samples of the recovered substances are subjected to forensic analysis by the Government Chemist or other designated experts. This analysis confirms the identity, composition and, in some cases, the purity of the drugs.
The scientific verification is critical in ensuring that the substance in question meets the legal definition of a narcotic or psychotropic drug under Kenyan law, particularly the Narcotic Drugs and Psychotropic Substances (Control) Act.
The estimated street value is then referenced in official DCI communications, including press statements and court filings, to illustrate the scale of the seizure and the potential impact on the illegal drug trade.
In legal proceedings, the valuation may also influence sentencing considerations, as penalties under the law can be tied to the quantity and market value of the drugs involved.
By combining physical measurement, intelligence-based pricing and forensic verification, the DCI maintains a standardized approach to drug valuation aimed at ensuring consistency, transparency and evidentiary reliability in narcotics-related cases.



















