Location, location, location.
If your in Texas (maybe not Travis County), Oklahoma, rural Pennsylvania, (etc) you're probably OK unless the evidence strongly suggests a bad shoot. If your in New Jersey, of course you will be arrested and I would expect the police to tear your house apart looking for your other guns, doing as much damage as possible -- heck, they might even burn it down just for fun.
Other states will fall somewhere in between.
Having one gun stored in your safe deposit box might not be a bad idea regardless. Think I'll take care of that this week...
"The only way to stop a bad guy with a gun is with a good guy with a gun"