Not to be gross, but they could see if the tape was over the nose cavity or not. I have always believed she taped her mouth only, fastening the tape over her hair, so she could not pull it loose. She may have pretending to play a little game with Caylee, so she would allow her to place the tape on her. The heart sticker was part of the game. Now comes the really bad part...the neighbors reported sounds coming from the pool that day...I think she put Caylee in her swim suit, and put her in the pool, and walked away. (No tape over the nose allowed her to breathe in the water and drown.) KC probably either went into the computer, or sat texting until no further sounds came from the pool. Then she fished her out of the pool, lay her on the ground to catch her breath, maybe twice, and then dragged her into the bedroom.
Then the flurry of phone calls to try to offer an accidental drowning theory, or to discover where everyone was at the time, but got no answers. She also had to try to remove the duct tape before anyone saw the body, and the wet tape proved impossible to remove the way it was all entangled in Caylee's wet hair. She removed the wet swimsuit, maybe thinking she would dress her, but it was too much hassle after fighting the wet suit off the inert body. Found the Pooh blanket from the bed, (it was under the Pooh quilt, and Cindy wouldn't notice it missing right away) and wrapped the wet body in it. Looked around and spied the canvas clothes hamper, thrust the body into it, along with the clothes she had removed from the body previously. Also a few of the toys that may have gotten wet from the body laying on them on the floor.
Somehow she managed to drag the body to her car and heft it into the trunk...it couldn't have been easy for her, she is a small person, and Caylee was a good size for her age. She was worn out, and decided not to worry anymore that day about the body in the trunk. After all "tomorrow is another day".
The "Tomorrow is another day" continued until the smell began, and the body fluids began to seep out of the canvas bag....what to do... what to do? She tried putting the hamper bag in a garbage bag, (which are advertised as smell proof.) however the garbage bag people never meant them to house a body. This was her first trip backing the car into the garage. When the bag didn't solve the smell problem she decided to try another bag, hence the second trip with the car backed into the garage. The last straw was when GA made her admit she had the gas cans, and she truly panicked when she thought GA might have glimpsed or smelled the body bag. She drove down to Suburban drive and disposed of the body as fast as she could.