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The more antigens that can be isolated from a crime scene blood sample, the greater the chance of confirming the identity of a suspect

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Answer:

Serology and DNA Analysis

Serological presumptive tests are used to corroborate if a particular red drop on the crime scene is indeed human blood. Combur3 test benzidine strips or Kastle-Meyer phenolphthalein test confirm that the trace is blood and precipitin tests corroborate that it is human blood [6,7].