If there was trace hair, fiber, or DNA evidence recovered, it in and of itself is simply not sufficient enough to make the case in a court of law. How can that be if it's DNA? It could be that it matches to a close friend of the girls who could make the argument that they had been in the house at sometime during the previous 2-1/2 months, and therefore induce reasonable doubt to a jury if that is the essence of the evidence in their case. If it matches someone already in prison for a very long time on a felony conviction and that is the essence of the evidence in the case then why rush to judgement? If no further evidence is ever developed then some future PA may have to take a "Hail Mary" shot at it if the day ever comes where the perp is going to be released from prison. But not until then. And I think perhaps that is some of what has been recently explained to Janis McCall.
In the news videos of the day forensic investigators can be seen carrying out bagged evidence. I, too have wondered what that evidence is and what is likely to be retested. In videos LE can be seen finger printing some cabinet doors which are likely in either the kitchen or bathroom, and I believe some larger items were removed from the house to be tested later. But I believe most of the bagged evidence was removed from Suzie's bedroom, Sherrill's bedroom, and the bathroom. That may not be all inclusive but by narrowing down to the rooms where the forensic evidence most likely came from you can come up with your own short list of what that bagged evidence was most likely to be.
I have been told that except for Suzie's bedroom the rooms in the house had all been freshly painted. If he reads this perhaps Dale417 can verify that. And remember, one of Sherrill's activities that night that tends to get overlooked, was putting up a wall paper boarder in one of the rooms. From the pictures it appears Suzie's room had never been painted. Perhaps it had been wall papered before and recently stripped but the walls appear to be old unpainted dry wall from when it was a garage.. The previous resident told me she used the room as a family room during the warm months. So I'm not sure on that.
We know that LE recovered 64 individual finger prints (going on memory); not from 64 individuals. Since the house had been freshly painted that seems reasonable to me. We know that all of the prints were identified. There was a story of an unidentified partial palm print but I don't recall the source for that now. So I too believe that the perps wore gloves. If they had been working in some capacity as day laborers in the weeks leading up to the abductions, in the estate homes just to the west and working out of their van then it is entirely possible & probable that they had work gloves with them in the van. And remember that anyone on parole would be required to have a job as a condition to their parole, and their parole officer would know exactly where they worked.
I don't know if the friends who entered the house that Sunday were swabbed for DNA or not. If any were considered suspects I'm sure they were asked to be swabbed & polyed but whether they would consent or not I don't know.