Kenosha's theory of a male that may have had an rx for testosterone injections seems very reasonable.. (NOT uncommon at all) Often it is prescribed for males with low testosterone levels due to increased prostate cancer risks, among other related problems. The ethanol in the syringe could have been from the testosterone as a drug stabilizer OR an ingredient in the production of Chloroform. The syringe was capped and had a needle. The needle comes off in the cap when you unscrew it from the syringe.. She could have made Chloroform from a recipe she found online (wasn't one of the ingredients we saw was alcohol..not rubbing alcohol but the type you buy at a hardware store?-which would be a reason for the Ethanol component, I believe water (ICE) was also an ingredient)also can be made with Acetone....She steals the syringe from the home...uses it to draw up the Chloroform she made with needle on the syringe, recaps it and stores it in the syringe. It doesn't mean she injected it into Caylee.. the needle is just stored in the cap when you twist off the cap. If you pull off the cap...the needle stays on the syringe. She could squirt the liquid out onto a rag or whatever she used. It isn't a big syringe...looks like a 3cc...I would have to find the pic and look again.. How much Chloroform is needed to knock someone out on a rag I wonder.
Wiki
Inadvertent synthesis of chloroform... (OR MADE ON PURPOSE)
The haloform reaction can also occur inadvertently in domestic settings. Sodium hypochlorite solution (chlorine bleach) mixed with common household liquids such as acetone, butanone, ethanol, or isopropyl alcohol may produce some chloroform, in addition to other compounds such as chloroacetone, or dichloroacetone.