The 4th Amendment pertains to search and seizures Police need a warrant to search and seize a person's belongings. In order to obtain a warrant, police must have probable cause. For example, the police can say "We believe John killed the man because we found his wallet at the scene of the crime and he did not like the victim". The judge would usually grant a search warrant for the police. In some cases the police even have to name a specific room in the house (ex: I’m looking for him in the living room). They can not just target anyone, anywhere in the house.
The 5th Amendment means "no double jeopardy". This basically means a suspect can not be charged for the same crime twice by the same court. For example, if a person kidnaps somebody they break state and federal laws. The person might not be committed guilty in state court but luckily can be sued in federal court. If federal court does not convict him/her then the person walks on the crime. It also has to do with due process. Due process is a certain process that must be followed before losing life, liberty, getting jail time, fines, etc. This includes not being forced to testify against yourself.
The 6th Amendment is the right to a speedy and public trial. This is the right of every person who is arrested. The person has the right to a fair and impartial jury, the right to know the charges against themselves, the right to confront accusers, and right to call witnesses to support themselves. The 6th Amendment also includes Miranda rights which states that the person arrested has the right to an attorney. Here is the speech that the police must recite:
"You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to speak to an attorney. If you cannot afford an attorney, one will be appointed to you. Do you understand these rights as they have been read to you?".
"You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to speak to an attorney. If you cannot afford an attorney, one will be appointed to you. Do you understand these rights as they have been read to you?".
The 8th Amendment protects suspects from excessive bail or fines. Bail can not be excessively high. The second part pertains to no cruel or unusual punishment. Some debate whether the death penalty is a cruel punishment however many countries still practice this form of punishment today including the United States.
Police may have the responsibility of keeping people safe and making arrests but they still must respect privacy. They are not allowed to do anything they want to do and that is where the 4th, 5th, 6th, and 8th Amendments come in to protect citizens.
Police may have the responsibility of keeping people safe and making arrests but they still must respect privacy. They are not allowed to do anything they want to do and that is where the 4th, 5th, 6th, and 8th Amendments come in to protect citizens.

