There is technology to get DNA from fingerprints. I don’t know if it has been developed enough to use.
The fact is that the wife could have bought the pressure cooker but STILL not be an accomplice.
It could be they are thinking someone was injured while testing the device or putting it together.
Maybe this is just thrown out there to see what scatters once it hits the media.
Okay. Thanks. I hope they aren't looking for an innocent bystander or first responder that just happened to touch a piece of the bomb.