The Bill Of Rights Scenarios

Someone informed the police that Nicky was selling illegal drugs. Nicky  was living with his mother. The police officers decided to investigate the matter by going to Nicky's grandmother's home searching illegal drugs.  The grandmother tried to prevent the police from entering into her home. Furthermore, the cops did not have a search warrant.  The cops forced their way into the home, and sure enough, some illegal substances were discovered in the sofa of living room.Which amendment would become an issue in the court system?

Did the cops act professionally in this situation?  Why?

Should the drugs be used as evidence against Nicky or his grandmother for this upcoming court case?  Explain

Shiela's husband is charged for being a spy from Russia.  Shiela refused to testify against her husband at his trial.  The reason for her refusal was to avoid releasing evidence to the court that would convict her husband of the alleged crime.  However, she is receiving pressure from the prosecution to take the witness stand, and testify against her husband against her will.Does Shiela have the right  to refuse to testify (speak) against her husband in this court case? Why?

Which Amendment is related to Shiela's right to refuse to testify (speak) or not to testify?

Rob was accused of robbing a pawnshop. The cops arrested him within two days after the incident. Since he was unemployed and had no job, he could not afford a lawyer to prove his innocence. He claimed the cops falsely arrested because he was at home when the crime occurred. A storeowner claimed Rob was the man who committed the criminal act.  Rob cannot afford a lawyer to prove his innocence.Which Amendment will help Rob in this situation?