This quote is from March 8th. So they some type of evidence from the crime scene but do they have DNA of the suspect or do they only hope they might? I appreciate your interpretation as the comments appear ambiguous to me.
"The FBI profile currently in the works will give police a better idea of who theyre looking for. Behavioral analysts can identify certain personality, behavioral and lifestyle traits the suspect would have.
All that information provides police with clues as to what kind of things they should be looking for as they serve search warrants. That, paired with evidence found at the crime scene, could help solve the puzzle.......(snipped by me)
....I know that we have the human element we have a very solid science element, he said. We are using every capable process that we have from a scientific perspective as everyone would expect us to, and we will continue to do that until there is nothing left to do. does that include DNA? It does."
http://fox59.com/2017/03/08/fbi-putting-together-profile-of-suspect-accused-of-killing-delphi-teens/