This is naive. Voss's house was several blocks from the Smarts. Remember he heard a car race by his house. He lives on Tomahawk. When he heard the scream like nothing he had heard before all the dogs in the neighborhood started barking and Voss went out and looked north into the barren hills where the scream came from, the opposite direction of the Smarts house.
The Smarts next door neighbor also heard a seperate sound, a voice or a bark, at 3:00 am and looked out their window but didn't see anything. There was no indication anyone outside the house heard Lois scream, which was in a closed house after 4:00 am.
Thank you for answering my question, Sherlock. I see that somehow, you seem to know that the kitchen window was NOT open when Lois went in and discovered the cut screen. Hmmmmmm....a cut screen on a CLOSED window.....seems odd to me. Oh well.....given your level of assuredness, I'm more than happy to let your statement stand.