What are some challenges in extracting dna from samples related to an active investigation?

There are various challenges in extracting DNA from samples related to an active investigation. Some of the challenges are the following:

1. Many DNA's touch evidence samples are poor-quality, low-template, and complex mixtures

2. Various laboratories are not capable to cope with the DNA complex mixtures

3.  The suspect's DNA may have been at the crime scene before the scene occurs.

4.  Just because DNA proves a suspect to be at the crime scene doesn't mean the suspect is the culprit.

5. Additional loci are being added due to a large number of samples in DNA databases.

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Explanation:

"The problem with DNA is that it is perceived as providing a unique and infallible ID," . "But very often there are disagreements among experts about whether results are a match." Reasonable doubt? In the glitzy labs of crime dramas, no one argues about whether the DNA is a match.

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explanation:

eat sweets get read spots

answer:

they will delete it again.

explanation: