Seems like there may have been more than just a little blood in that glove. I know it says "red goo" but I'm gonna call a spade a spade.
About the smell ... blood can have an awful odor. Have you ever bought a tray of meat and it has that fiber thing in there that helps soak up the blood? Well just put one of those in your trash can and let it sit and you'll know what I mean. We found out the hard way. I forgot to empty the trash when we left for the weekend one time and when we came home the whole laundry room stunk to high heaven. gag.
Sorry can't remember who said it up thread but I agree (now that I think about it) that the glove may have been the turning point between missing and homicide.
JMOO
ETA: The glove (if it's the cleaning kind) will not absorb the blood so it sits there and gets thick and "gooey" and may take a while to dry up.
Sorry for being so graphic.