I'm pretty sure this (the syringe, toilet paper roll, bottle) was someone's discarded drug paraphernalia. I've been researching it and apparently empty toilet paper rolls are often used as pipes for smoking pot (called a "steamboat") or heroin and just about any other drug you can think of that is smokeable.
Since we know that heroin is both injected and smoked ("chasing the dragon", it stands to reason the syringe and toilet paper roll could've been used for that. From what I've read, many drugs are both smoked and injected: meth, cocaine/crack, heroin. Of, course someone could have been injecting one drug and smoking another. Or, it could have been two people, one smoking, one injecting. Steroids (testosterone) are also injected, obviously.
Due to the combination of the syringe and the empty toilet paper roll, I'm beginning to think this was unrelated to whatever happened to Caylee. I think someone just dumped this little bundle after using drugs. It could have been KC, but just as likely, if not more likely, someone else unrelated to the case.
Here are some links that discuss drug users practice of both injecting (the syringe) and smoking with pipes made from toilet paper rolls.
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from the urban dictionary:
Steamboat 5 up, 29 down
get this on a mug
Inhaling marijuana smoke trapped in a toilet paper roll or similar device.
Luke: Hey, get that toilet paper roll out of the garbage for me.
Suzzy: What for .. ?
Luke: Trust me ~ you'll love this. I'm gonna give u a steamboat.
http://www.urbandictionary.com/define.php?term=steamboat
---1st post, 2nd paragraph at
http://www.stonerforums.com/lounge/other-psychotropics/10589-i-just-bought-heroin-first.html
---under section entitled "Pipes of any Type" at :
http://www.sacsconsulting.com/book/chapter5.htm
---2nd post in the "Comments" section at:
http://durhamcounty.mync.com/site/d...itoring-sale-of-potential-drug-paraphernalia/
---under section entitled "How to Smoke Heroin" at:
http://www.heroindetoxrehab.com/heroin/how-to-take-heroin
---also, see entry for steamboat here:
http://wiki.answers.com/Q/What_are_the_kinds_of_weed
JMHO :twocents: