Answered the question
Yet another article with essentially the same information... but adding a link to the search warrant.
http://www.jsonline.com/news/waukesha/128707913.html
Says they were on a small deck (apparently) between the rear door & the garage walk door.
When confronted, burglar said he had a gun, then came toward the homeowner menacingly, got close enough to be pushed away, then backed him into a corner.
Police say he seems to have had a cell phone in one hand when he fell, as it was lying on his chest.
Rat bastard PD wanted a search warrant because the homeowner was only wearing underwear when they got there... well, DUH! He'd been awoken in the middle of the night. I'm surprised he was wearing that much.
But instead, they thought maybe he'd taken off whatever he was wearing because it had blood spatter.
(No news as to whether or not they found any clothing fitting that description.)
Now why would he call 911 to report the burglary & defense, admit the attacker cornered him & he shot in self-defense, then try to hide the clothes he wasn't wearing??
They also siezed 3 sizes of ammo, but no other guns, so hopefully he's kept the others someplace else, & will still have defensive tools while this mess is going on.