I am not sure there would have been enough tissue left to find the remnants of any sort of recreational drug. I work in a Clinical Laboratory, and I will ask our toxicologist tomorrow. Most drugs are measured in urine or blood. Hair can be used for some things, but hair typically doesn't represent current drug use - it is something that builds up over time and is most often used to determine chronic drug use. Even if there was some way to detect drugs in a body that was essentially a skeleton, I don't think they could hang it on anyone that SG was with that night.