ChemicalEuda

I assume he wants to conservate his Temazepam prescription by injecting it, or perhaps he'd prefer a faster onset. Nothing wrong with that. Diazepam is hardly soluble in water, and according to a 2 second google search the exact percentage is 0.05 mg per mL of water. The most soluble is Midazolam and I think Rohypnol. The safest way to inject benzos is to add the crushed pill matter to a solution of propylene gylcol diluted in 5-10% ethyl alcohol and 10% d-water. Benzodiazepines will dissolve readily in only a few 1/10CC's of this solution. Also make sure to properly sanitize your equipment and filter the solution; preferably with a .5 micron wheel filter.

It all depends on your area, who you kill, and how smart you are. I've heard from local LE that roughly 1/3rd of murders are solved in my county. The forensic techniques you see on Court TV and CSI are rarely applied in a lot of murder cases unless the victim is someone high up (sad, but that's how things work). I'd imagine it'd be pretty easy to get away with a random stabbing if there are no witnesses, no cameras, and the place is frequently traveled and if you don't leave any solid evidence behind (such as a knife with your fingerprints on it).