On that narrow point, would one be more likely to "hole up" / not respond if innocent or guilty? Say a SWAT team rolled up on your house right now. Would you go out and say hi? Some might, some might not. If I trusted the law to be fair and just, while also trusting the police to apply that law appropriately then I would trust my innocence to protect me from getting my dog shot, myself shot (or beaten or maimed), etc. As it is, any interaction with police carries risk, regardless of innocence, and an interaction with a SWAT team is taking that risk to another level. So, it's perfectly understandable to me why an innocent man would be hesitant to open the door. And, therefore, I don't see that reaction (or lack thereof) to be indicative of guilt at all.