Answer:
The Miranda warning was strengthened by the supreme court in 2004 in Missouri v. Siebert
Step-by-step explanation:
The Missouri v. Siebert case was a landmark decision by the Supreme Court of the United States that made it mandatory for a Police Officer to read out a suspect's Miranda rights before arrest.
Miranda warnings is read out by the police to every suspect that is jailed, reminding them of how they have a right to remain silent and can remain silent until they find a proper lawyer to represent them.
Anything that a suspect says at this point can be used against them in courts and hence, it is a custom to remind them of their rights.