I felt the same way when I read they waited for 20 minutes. Unfortunately, it doesn't seem to be stated if the cops initially showed up with vests and guns draw

I felt the same way when I read they waited for 20 minutes. Unfortunately, it doesn't seem to be stated if the cops initially showed up with vests and guns drawn or if more showed up after failure to comply. If it was the former, I could understand the shock and cloudy judgment experienced by the scientist when you've realized your house is under siege.