Tricky wording, IMO. Is there anyone else whom "he could not exclude"? Could he "not exclude" BVD, or the VD boys? Could he "not exclude" any particular one of millions of people? Who could he "include"? And the phrase "selected at random" is not the same as "selected from a group comrising x,y,z".
DNA comparison and identification holds some promising possibilities for the criminal justice system, and for society; however, like any tool, it is only as reliable as the person, or people, using it and presenting the findings.