Can't find it right now, but this is based on a Vine with the exact same composition. The woman in the video has very red eyes and is trying to inconspicuously keep looking away from the police so they don't drug test her.
I was under the impression that she was on the way to do it. Otherwise the backpack would have a blood stain from the used hammer.
The backback does look like it got stained a little, as it has faint red droplets. Also, shes a professional murderer, the backpack doesnt have to have bloodstains, she'd probably bw smart enough to not get it bloodied too much lol