> The 900 men, who were between 14 and 70 at the time of Ruf's killing, were asked to have a saliva swab test to have their DNA identified. That’s a hole lot of adult male DNA. > While it is unlikely the murderer will take the test, investigators hope a relative will and through their results link the DNA on Claudia's body to the perpetrator. Pretty well admitting there’s not much chance they’ll find him just maybe the family. > The new push comes after investigators in 2010 tested 350 men's DNA in the area, but got no matches. Tried in 2010 with a group 1/3 the size and it didn’t work. > Police did not say if any of the 350 men previously tested were part of the new group of 900 men In total now over a thousand DNA profiles on adult males. > Police said after the tests have been taken all DNA that does not come up as a match in the genetic analysis will be deleted. That’s extremely unlikely.