The Miranda warning is a statement that police is requires to give to criminal suspects in police custody. This warning advises them of their right to remain silent and their right to refuse to answer questions.
Opponents of this practice argue that by having this process in place, police investigations can sometimes be undermined. I, however, believe that this should not outweigh the protection of individual rights. If the police is properly trained, there is no reason why they would not be able to find the information they need despite the warning, and despite the person's right to remain silent. Moreover, it is important to protect this right for the accused person as well, as it makes it more likely for him or her to have a fair trial.