I believe the initial post was if DNA was on the clothing of BS or HS, to me that would be totally considered evidence.
Also the home was cleaned top to bottom, the housekeeper said it was clean except for a few leaves at the door which she swept out that Friday morning. (- off subject of this post but about the housekeeper - I am curious, she said she started the laundry, not sure what laundry she had to wash, she was there on the Tuesday or Wed 2 or 3 days prior and she did laundry that day as well. Did she only clean bed sheets? none had been slept in and the clothes hamper would be empty since BS & HS never changed clothes since Tuesday.)
IMO any DNA from anyone, especially family should not be found at 50 Old Colony Rd. Especially in the basement. It has been professionally cleaned and kept tidy for showings. The family have all said they rarely went to 50 OC. I am sure LE know the last dates and times each of them visited and what rooms they were in when they visited. IMO if any Sherman DNA other than BS or HS was found, it should be considered evidence and worth investigating.