Skynet doesn't have a KE contact, so getting the blood sample checked would be down to Gunter I guess. I think that the blood is probably better used for magic tracking, in which case time is paramount as the longer we wait the farther they get and the farther they get, the more difficult it is to locate them using magic. And I'm pretty sure that as professional as these guys were, the blood sample would not lead to any usable info from the SIN databases. We might find that the DNA is on file and linked to other crimes, but that'll probably be all that comes back. It almost certainly won't lead to a SIN or ID. However, if we have enough blood to do both things, then it can't hurt, but if we only have enough blood for one or the other I think that magical searching will provide the better results.
Of course, I also don't think anyone has the rituals needed, so we'll need to call upon a contact. My only magical contact is in the California Free State and so can't help here.
Moving forward, I'd like to scan the street camera footage prior to the abduction on the off chance that they didn't wipe that information. Do we have that footage (the previous hour), or am I going to have to get that?
I will assume that if I am asked to do something by a superior officer, that it is sanctioned. So if I need to hack the KE servers to keep tabs on the investigation, etc., it won't be a problem. Again, if someone has contacts that you can use to get that info, then that works as well.