FSM 23: Alcohol

Alcohol is among the most frequently encountered substances in forensic practice - yet its interpretation is rarely straightforward.In this episode, we examine the pharmacology, physiology, and medico-legal implications of ethanol in forensic contexts. From road traffic fatalities to custodial deaths and accidental injury, alcohol often plays a contributory role.We explore:* Absorption and metabolism of ethanol.* Blood alcohol concentration (BAC) and its interpretation.* Tolerance and chronic alcohol use.* Behavioural impairment and risk-taking.* Alcohol-related injury patterns.* Post-mortem production of ethanol.* Sampling sites and preservation.* The relationship between alcohol and sudden natural death.* Alcohol in drowning, falls, and violence.A central principle emerges: numerical BAC values require context. A concentration cannot be interpreted in isolation. Individual tolerance, co-ingested substances, and timing all influence meaning.We also address:* The legal thresholds for driving offences.* Retrograde extrapolation and its limitations.* Interaction with other depressant drugs.* The language used in medico-legal reporting.Alcohol is socially accepted, widely used, and deeply embedded in forensic cases. Its ubiquity demands disciplined interpretation.Key Takeaways* Ethanol is rapidly absorbed and metabolised but varies between individuals.* BAC values must be interpreted with caution.* Post-mortem ethanol production may confound results.* Alcohol often acts as a contributing factor rather than sole cause.* Tolerance influences behavioural impairment.* Toxicology must align with clinical and pathological findings.This episode highlights that even the most familiar substance can present complex forensic challenges. This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit drmanaankarray.substack.com/subscribe