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Kimi SeifertJoshua Allison

DNA Forensics1HistoryStarted with DNA fingerprinting, the unique DNA patters of an individualDNA evidence for crime has been used more frequently in the last 15 years

DNA testing established in the 1980s2

How to find DNAScientists take DNA probes that bind to complementary DNA to make a unique pattern; if 4 or more similar patterns are found they can conclude it is the same personThere is a slight chance that person could have similar DNA to another (identical twins or family member)

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STR AnalysisShort Tandem Repeat technology Used to evaluate specific regions within nuclear DNADistinguish DNA from to one to anotherFBI uses it as a standard with 13 specific regions for their software programs that keeps the DNA profile of convicted felons4

STR sample of the software

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6Mitochondrial DNA AnalysisUsed to solve cases from pastMother and children have the same mDNA because embryo comes from mother

For older samples such as bones, teeth, and hairDoesnt need nucleus like other tests7PCR AnalysisPolymerase chain reactionsUsed to make millions of exact copies of a DNA sampleUsed to enhance DNA from other tests8

Used to ensure these items were authenticSuper Bowl XXXIV footballsSummer Olympics 2000 memorabiliaScientist placed synthetic DNA strands that can be identified with a laser in the future

Other uses of Forensic DNA9

HolocaustDNA Shoah ProjectReunites family who was lost or killed during the warHelps to find victim remains

10Famous Forensic CasesSnowball the cat caseWoman killedHusband suspectCaught by cat hair on his jacket

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OJ SimpsonWife, Nicole Brown and boyfriend murdered OJ prime suspectBloody footprints at crimeGlove with bloodBlood matched OJsOJ had cuts on fingersNo cuts in gloveBloody footprints OJsObjects with both OJ and Browns BloodSocksClothingMoneyCar Found not guilty DNA was tampered with

12http://www.nclark.net/Forensics13