And for something out of the box - a semen sample!
http://www.mccannpjfiles.co.uk/PJ/JOHN_LOWE.htm"The voluntary samples were also compared with 'crime stain 1', a DNA profile obtained by Portuguese scientists using their DNA profile system. The profile was recovered from suspected semen on a blanket in the apartment 5.
From the available records, I conclude that 281 voluntary samples were eliminated as contributors of DNA to the list of search profiles above, since its profile does not match the profile sought; consequently, the DNA can not have originated from them.
I conclude further that, the DNA profiles obtained from the 'crime stain 1' and 286A/2007/CRL9A & B coincide with Charlie Gordon (bar code 51156964). I believe that Charlie Gordon was born on 29 January 2005, and if this is the case, in my opinion, the DNA profile obtained in 'crime stain 1' is not the result of semen found on the blanket."