Just some thoughts and info I came across reading about time out dolls........
These dolls are known as Time out dolls, pouty dolls, corner dolls and cry baby dolls. They are at craft shows and used for home decorations, but they are also often seen at car shows. Assuming LISK is male, a man would know these dolls from car shows more than he would be aware of them through craft shows, unless his mother or grandmother happened to have had or made one. Remember that GC was awake at 5am to attend a car show when Shannan came knocking on his door. Not pointing the finger at GC just stating everything we know so far.
At craft shows or car shows these dolls are not intended for children and are not made to represent feelings of "punishment". Most people place them on cars to look like a cute doll is working on the car restoring it into a classic, at car shows. If you google "time out dolls at car shows" many examples of their true intended nature will pop up.
IF these were placed by the killer I think that there could be an analogy made that if a time out doll is a finishing touch to a car restoration project, then maybe similarly the time out dolls are the finishing touch to LISK's murder project. So often we hear that murder is the serial killer's "work" and it is something that he is "proud of". If that's true, and if he takes part in or admires the work of old cars, its not a far leap to him adding the corner dolls for his "show", which would have been the families' memorial service.
I also think the type of dolls they are might narrow an age on the person who placed them there. In my research time out dolls are usually from the "older timers" at the car shows.
Here's some links where I did some reading on their history, how they are viewed within their subculture, if anyone cared to check them out too........
"mostly old timers do this (include dolls)":
http://jalopnik.com/5834801/why-do-car-collectors-put-creepy-dolls-on-their-bumpers/
http://www.pro-touring.com/archive/index.php/t-43196.html
"dolls seen all over rural new hampshire":
http://forums.vwvortex.com/showthre...e-the-only-one-that-finds-these-things-creepy
"Those "time out" dolls are a sure sign of a car show dominated by grandma and grandpa types... it is more and more apparent now because the owners of these cars are baby boomers who are heading into the golden years of retirement.":
http://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=968565
Brief description of dolls as decorations:
http://thehairpin.com/2011/11/looking-for-something-to-lighten-up-a-dark-corner
Excerpt from LOST GIRLS book referring to GC awake to attend a car show:
http://lostgirlsbook.com/excerpt/