Answer: About (50-90) full length hair strands should be collected from the scalp to use as a sample.
Hair is a potent physical evidence, used to proof the culprit of crime. The hair analysis goes with preliminary and confirmatory analysis in forensic lab. This requires ample of sample should be available for analysis and comparison. Therefore, about (50-90) full length hair strands should be collected from the scalp to use as a sample.