Paul Bernardo's Case Study

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When Paul Bernardo was a teenager, he became interested in women because of his porn obsession and acted on what he saw through films and magazines ("Paul Bernardo: Criminal & Biography,” 2017). By viewing this inappropriate media, he knew what type of woman he lusted after; one that was submissive and eager to please him ("Paul Bernardo: Criminal & Biography,” 2017). Later on in life, Bernardo was known for doing multiple attacks against women in the late 80s in Scarborough, Canada, but became known for the deaths of three high school girls; Tammy Lyn Homolka, Leslie Mahaffy and Kristen French. Tammy Lyn was drugged and raped by Bernardo; Karla participated in the sexual acts on her sister and videotaped the ordeal (Butts, n.d.). Tammy choked…show more content…
Identification means the steps needed in the analysis of unknown fluids to see what the substance is (“Biology,” 2016). Individualization determines whether a certain individual may or may not be the donor of a bodily substance by examining various markers (“Biology,” 2016). Processing biological trace evidence uses highly complex, automated technology to create a DNA profile that helps the investigators through the association of suspects to victims and to crime scenes (“Biology Services,” 2017). By using techniques such as polymerase chain reaction (PCR), forensic biologists can use variable markers found on the regular chromosomes (STR’s), the sex chromosomes (Y-STR’s) and within the mitochondrial DNA to distinguish one person’s DNA from another to a high degree of certainty (“Biology,” 2016). Forensic biologists are involved in assisting investigative agencies because police were led to Bernardo by a police sketch (“Serial Killers: Paul Bernardo and Karla Homolka,” 2013). The police took DNA (hair, blood and saliva) from Bernardo as a matter of routine to test it against specimens found on a rape victim’s clothing (Butts, n.d.). Forensic biologists were able to name the substances left on Kristen French’s body and match it to Bernardo’s DNA by processing it. On February 17th, 1995, Bernardo was arrested for the murders of Mahaffy, French, and the Scarborough rapes (Butts,

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