Final answer:
Anything Ricky told the police must be excluded from evidence because the right against self-incrimination under the Fifth Amendment was violated when the police failed to read him his Miranda rights.
Step-by-step explanation:
The police failed to read Ricky his Miranda rights after arresting him. Therefore, anything Ricky told them must be excluded from the evidence, as Ricky has the right against self-incrimination. This right is protected under the Fifth Amendment, as established by the U.S. Supreme Court in the landmark case Miranda v. Arizona.
In this case, the Court ruled that the accused must be informed of their rights, including the right to remain silent and the right to an attorney. Without these warnings, any statements made by the accused cannot be used against them in court, as they may not have been made voluntarily and with full knowledge of their rights.