The only way that the DNA can be matched to a particular person is if that person's DNA profile is in the registry or they give a sample. The only way someone's DNA gets in the registry is through a criminal case against them. Unless the police chief and the mayor gave samples, which would be absurd since they aren't accused, it isn't them.
There has to be a nexus between the profiles found on her and a legally-obtained source against which it can be compared that the lab was asked to compare it with.
I have not read the complaint. My comment was pure snark - I am not aware that the DNA is identified; I just assume it is different from the DNA already discussed/identified earlier.
I understand and do not necessarily disagree with your comments about going ahead with a hearing. I do not want it to go to trial, however. And yes, I understand that the May 7th date is just a hearing.