A blood alcohol test may look objective, but forensic evidence does not begin in the laboratory. It begins earlier—in the human act of observing, recording, and interpreting signs of impairment.

In this episode of The Forensic Lens Podcast, I examine a recent study showing how medical evaluations conducted during forensic blood sampling can introduce systematic bias even before laboratory analysis begins. The findings are troubling: physicians varied widely in how they assessed impairment, with some overreporting, others underreporting, and many inconsistently performing or documenting standard motor tests.

This episode explores why the pre-analytical stage matters so much in forensic science. Machines may produce precise numbers, but reliability also depends on standardized observations, complete documentation, calibrated procedures, peer review, and regular checks on examiner performance. If error enters early and repeats, even excellent laboratory science can reach the justice system already weakened.

For countries still strengthening forensic systems, the lesson is clear: better equipment is not enough. Evidence must be produced through procedures the justice system can trust.

📖 Read the full article on Agham Road.

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#TheForensicLens #ForensicScience #ForensicToxicology #SystematicBias #ScientificStandards

The Tacloban school shooting lasted only minutes, but the warning signs may have developed over weeks. In this episode of The Forensic Lens Podcast, I examine how grievance can harden into revenge, how violent intentions may leak through messages and online behaviour, and how access to firearms can turn fantasy into lethal capability.

The discussion explores why mass violence rarely has a single cause, how intended targets can expand into “collateral prey,” and why prevention must go beyond guards and bag inspections. Effective threat assessment requires schools, families, mental health professionals, and law enforcement to recognize when resentment is becoming fixation—and when a fantasy is acquiring a weapon, a target, and a date.

The case also raises difficult questions about juvenile criminal responsibility, particularly reports that the suspects may have considered whether their ages would protect them from criminal liability. Tacloban reminds us that the most important evidence may appear before the shooting begins—if someone knows how to recognize and connect it.

📖 Read the full article on Agham Road.

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Popular culture often portrays bloodstain pattern analysis as a near-infallible way to reconstruct violence. But blood may obey physics while its interpretation remains vulnerable to human judgment, uncertainty, and error.

In this episode of The Forensic Lens Podcast, I examine a new study testing HemoVision, a system that reconstructs the three-dimensional path of a blood-bearing object during cast-off events. Its tubular swing path envelope offers investigators a measurable region of probability rather than one supposedly perfect trajectory—an important step toward more transparent and scientifically restrained interpretation.

The technology is promising, but the study’s controlled conditions, analyst-dependent decisions, and limited blind testing mean it is not yet ready to resolve the complexity of real crime scenes. Before such reconstructions enter routine casework, they require independent validation, known error rates, proficiency testing, and local studies under the conditions in which they will actually be used.

📖 Read the full article on Agham Road.

🌐 Learn more about my work here.

#TheForensicLens #BloodstainPatternAnalysis #ForensicScience #HemoVision #ScientificValidation