Questions:

• When do the police need a warrant to make an arrest?
• If I'm arrested, do the police have to "read me my rights"?
• Will a judge dismiss my case if I was questioned without a Miranda warning?
• What's the best way to assert my right to remain silent if I am being questioned by the police?
• How heavy-handed can the police get when asking questions?
• Can a person who is charged with a crime be forced to give bodily samples?
• I was pulled over at a roadblock and asked to wait and answer a police officer's questions. Is this legal?

Answer:

When do the police need a warrant to make an arrest?

As long as the police have good reason (called "probable cause") to believe that a crime has been committed and that the person they want to arrest committed the crime, they can, with just one exception, make an arrest without asking a judge for a warrant.

The exception? There are few places where the adage "a man's home is his castle" still applies, and an arrest at home is one of them. The police must have a warrant to arrest a person at home if the arrest is for a nonserious offense -- such as a simple assault  -- and there is no fear that the person they want to arrest will destroy evidence or cause harm to the public.

To learn more about when search warrants required, read Nolo's article Search Warrants: What They Are and When They're Necessary.