So i recently learned that in the Ukraine they use a variety of "chemicals" to create whats commonly known as a "truth serum" as a means of gaining a confession in the event of a seriou crime.

I was watching Crime Watch on youtube and had commented about how sometimes cases run cold when theres no admissable evidence and no confessions. And how its unconstitutional to harrass and continuously interrogate suspects with no evidence outside of hearsay or "gut feeling". Someone had mentioned how in the Ukraine when a case is in danger of running cold because the lead suspects are either uncooperative or theres not enough evidence to hold them theyll likely use this truth serum to gain a confession.

I did a quick wiki and found that in the US thats considerably unconstitutional as it violates a persons right to remain silent.

So i thought id ask, in the event of a case in danger of running cold and most evidence points to the lead suspect but prosicuters dont have a strong enough case should the truth serum be implimented? (If it werent unconstitutional)