You need to re-activate the area where the livers spilled in order to remove it. Fill a spray bottle with clear water and spray until the area is thoroughly wet. Let it set for about 5 minutes. Then wipe it dry it with paper towels. If the stinky area is on carpet, do the same but after wiping up the water, spray with "409 Carpet Cleaner," work it into the carpet with a wet sponge or brush. Then dry the area with paper towels. Whether the area is a liner or carpet, as a last step, cover it with Arm&Hammer Baking Soda and leave it for a few days. I've done that and it worked for me.

If, for some strange reason, it doesn't work for you, as a last resort I recommend a gallon of gas and a box of matches or........trading cars with your mother-in-law.