Which amendment is violated by coerced confessions and lack of protection from self-incrimination?

The 5th Amendment is specifically designed to protect individuals from self-incrimination and to ensure that confessions are obtained voluntarily and without coercion. This amendment guarantees that no person "shall be compelled in any criminal case to be a witness against himself," meaning individuals cannot be forced to testify against themselves or to make statements that could be self-incriminating. When confessions are coerced, they violate this fundamental protection by undermining the voluntary nature required for such statements to be admissible in court.

The other amendments listed serve different purposes: the 3rd Amendment deals with the quartering of soldiers, the 4th Amendment addresses unreasonable searches and seizures, and the 6th Amendment ensures rights related to criminal prosecutions, such as the right to counsel and a fair trial. While these protections are crucial in ensuring justice and individual rights, they do not directly relate to the issue of coerced confessions or self-incrimination. Thus, the 5th Amendment is the pertinent constitutional provision in this context.