In April 2002 the Wisconsin Innocence Project of the University of Wisconsin Law School obtained a court order, over the state’s objection, under Wisconsin’s postconviction DNA testing statute for new testing under newer, more powerful DNA technology. The Wisconsin Crime Laboratory succeeded in developing a PCR/STR profile from a pubic hair retrieved immediately after the assault from the victim’s pubic hair combings. On September 10, 2003, the lab results were released, proving that Avery and his witnesses were telling the truth, that he was not at that beach on July 29, 1985, that he had nothing to do with the crime, and that the eyewitness was simply mistaken, as eyewitnesses often are. The DNA test conclusively excluded Avery as the source of the pubic hair, and also identified the true perpetrator of this crime, a man named Gregory Allen, who is currently serving a 60-year sentence in prison for sexual assaults committed after this one. Allen was matched to the DNA profile in this case through a search of the state and national DNA databases.

http://www.truthinjustice.org/avery.htm

They can extract DNA from pubic hairs. Why not in the Ramsey case????