On the matter of DNA, I cannot recall if the TPS ever stated they recovered DNA at the crime scene.
Is anybody aware if the TPS was collecting DNA samples from various family members, staff and other individuals they have interviewed for exclusionary or other purposes? If the TPS has not been collecting samples, I would tend to believe they did not find any random or unknown DNA at the site.
That means either the assailants were amazingly skilfull at not leaving any DNA or contaminating the scene in such a way that no useful DNA was recoverable, or the TPS just were not able to find any.
If no unknown DNA was discovered that could cause the TPS to focus
on a smaller group of Persons of Interest.
In summary has the TPS been doing DNA sampling?
29 minutes inside Barry and Honey Sherman’s home: Who was the visitor?
May 2019 rbbm
"Idsinga also said in the statement that police have recently obtained more search warrants — he did not say how many — and that "DNA samples" are also being reviewed."
"Another apparent shortcoming of police is tardiness in obtaining DNA samples from people who were known to be in the Sherman house for routine reasons or because they are family. Typically, police take DNA and fingerprints from people like this to rule them out as suspects. This process did not begin until nine months into the investigation."