And put a knife in his hand....
You better expand on that....If for, gawd sake, you have to shoot someone and they don't have a gun, have throw away/sell all your kitchen knives that DONT match and go to some obscure garage sale and pick up an old nasty knife (big and rusty) as a drop knife. Bottom line is make damn sure that the knife you place to protect your livelihood from law suits does not match anything (even close) in your home.
A sharpened old screwdriver works great also ;)