Answer:
Sixth Amendment
Step-by-step explanation:
The United States Sixth Amendment, which was ratified in September 1789, safeguards the rights of individuals or defendants, relating to trial by jury. It comprises the right to a public trial without excessive or unfair hesitation. It also includes the right to a lawyer, the right to an impartial jury, amongst other related matters as specified by the US Sixth Amendment.
Hence in this case, given that Agnus is in jail for 50 years without a trial, the law enforcement and the court have violated the SIXTH AMENDMENT.