Cecil Himself Answered My Question on StraightDope.com
 

The MAN himself addressed my inquiry!

Now, the girlfriend is really nervous !!

If you're unfamiliar with The Straight Dope, browse around for a while. He's addressed just about anything you can think of.

"Fighting Ignorance Since 1973. It's Taking Longer Than We Thought."

JP

I need more info about "least detectable." Follow up on that for me, O.K?

"one gram of vaporized polonium can kill nearly 1.5 million people."

That's pretty toxic.

One of my favorite infotainment sources.

Need to buy a bigger book of his stuff.

Succinyl Choline is pretty good for slipping through tox screening, if you believe True Stories of the FBI, or wherever I saw that. Sux don't take much, works fast, but leaves a needle mark, which Quincy is sure to spot.