The situation that describes a violation of the due process clause under the Fourteenth Amendment is:
The police performed a search on Stanley’s house for illegal substances even though they did not have a search warrant. When they found a trunk full of illegal substances, they arrested Stanley.
This scenario illustrates a violation of due process because the police conducted a search without a warrant, which is a violation of the Fourth Amendment's protection against unreasonable searches and seizures and also implicates the Fourteenth Amendment's due process clause.