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Not entirely sure about this since I haven't seen the series (I know there is some cloning involved there though), but could it be Gilgamesh?
Edited by interimdisposeI dunno why but the synopsis of Speed grapher came to mind from reading that. Can’t confirm cause can’t heckin watch it (thanks to only dubs being on my usual site which apparently are great so I wanna compare the two) BUT it’s about some psychic military detective or something and there are white haired dudes so that’s like 2/10 bases covered.

I watched a fairly mature anime (there was smoking, drinking, blood, etc) on SBS anywhere from late 90s to the 2000s. Key points I remember:
edit: found it, Goku: Midnight Eye II - sequel to Goku: Midnight Eye
Edited by jormis29