Various - bloodstains across finland - Bloodstain | Definition of Bloodstain by Merriam-Webster

In the largest search in West Yorkshire, the police searched around 800 houses and 1500 gardens, outbuildings and sheds on her route from the bus stop to her house, as well as searches of a three-mile stretch of canal, drain shafts and moor land.

The technological state of blood evidence analysis has rapidly advanced in the last 20 years. ln the early seventies, most crime labs relied upon the ABO blood grouping system to characterize bloodstains. This meant that the blood could have come from 4 to 49% of the population. In the 1990's, most crime labs are relying on DNA analysis to characterize bloodstains. A blood source can now be statistically narrowed down to one person out of several million or even several billion. (1) A crime scene investigator should know which method or methods of bloodstain analysis are available from his or her crime lab, the FBI lab, and private labs.

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