The joy ride after the wild goose chase

Recently several media publications were bold enough to expose the sham that lies behind police interrogations involving narcoanalysis. Injecting suspects with a so-called truth serum, before they have been proved guilty, exposes one of the extremely crass and crude methods that the law condones (in India).
On the lighter side why don't these so-called preservers of the law take their suspects to the nearest bar and make them have their fill of the strongest liquors. Surely some of these "guilty" offenders might just spill the beans for all we know or maybe even "sing" for them. Or how about Cocaine or hashish, and if thats too costly for these guys in mufti, they could try good old marijuana.
The interrogators too could have a sniff at the substance on offer just to test whether it truly works. Once both the parties are "high", they could swap truth stories with each other and perhaps the "real" truth would spill out in the bonhomie.
These are the Dr Deaths' of today in the garb of forensic experts. The description of it being "scientific" just makes everything seem very sophisticated to the lay man.
The basic intention is the age old classic manoeuvre. When things go very wrong, and the law enforcers are clueless as to what went wrong they are under pressure to produce quick results - from the public, the politicians, the higher-ups and in order not to lose their credibility they have to produce results fast. What way other than a quick fix(pun intended) for this? In fact, the situation for them would work the other way round if they solved the entire mystery in a short spell- pats and kudos from everyone.
It's high time the law enforcers and others who condone it, recognize narcoanalysis for what it truly is.