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According to defense attorneys, a key point the report makes is that the accuser had sex with another man who was not a Duke lacrosse player. However, Knudsen said that it could be a little less relevant to the case if the unidentified male is a person known to the accuser, According to defense attorneys, a key point the report makes is that the accuser had sex with another man who was not a Duke lacrosse player. However, Knudsen said that it could be a little less relevant to the case if the unidentified male is a person known to the accuser, because that might mean that the DNA had been there five to six days prior to the alleged incident.

I am not a rabid fan of CSI, and I am not a forensic DNA expert, but I have two observations:

1. I don't believe this is true that DNA could remain there for almost a week.

2. If true - gross.

I don't believe this is true that DNA could remain there for almost a week.

Genetic Identity Semen/Sperm Identification

http://64.233.179.104/search?q=cache:DYorvOCnX_YJ:www.dnatesting.biz/Semen_Sperm_ID/semen_sperm_id.html+semen+dna+can+last+days&hl=en&gl=us&ct=clnk&cd=5

During and after a sexual encounter, bodily secretions may be deposited on a number of items, including clothes, bed sheets, undergarments, discarded bathroom tissues, bath towels, carpet, couch cushions, condoms and feminine products, and can be identifiable for years as dried stains. With an average composition of 200–300 million sperm in 2.5 –3.5 mL of seminal fluid, sperm can be detected in semen stains present on a variety of materials. Sexually active women will often have sperm present in the vagina immediately following sexual intercourse, and sperm can last as long as 3–5 days in the vagina.