DNA and CODIS, law homework help

I need to have a introduction paragraph as well as a conclusion paragraph on the following topic:

DNA is the evidence everyone wants to see in an investigation. It is extremely fragile and even has its limitations. In a 1.5-2 page Essay, address the following prompts:

    • Identify and explain items that should be collected from the victim and the suspected perpetrator of a sexual assault.
    • What is CODIS?
    • What samples are included in the CODIS database?
    • What is PCR/STR analysis and how is it used?
    • What is mtDNA?
    • Where does mtDNA come from?
    • How can it help an investigation?

Be sure to address all prompts and cite your sources in APA format.