How does the police force tie-in with the court systems directly??

Question

For example, I've thought of witnesses. Police both interview witnesses who will later appear in court for their crime. As well, many times, police themselves are the very witnesses, in some incidents.

I need ideas such as this...
Thank you. :)

Answer 1

Watch the tv show "Law and Order". The Police investigate possible crimes and make arrests based on "probable cause".

Once the investigation is completed, the police will either give their evidence to a Prosecutor who will decide whether or not to prosecute (or go for an indictment) OR the police will make an arrest themselves.

Once the police make their arrest, they usually end their investigation and the only role they play is to testify as witness in court against the accused.

The Court will "process" the accused by allowing (or not allowing) bail, by setting court dates for "discovery" and the final court date for trial.

In summary, the police investigate, arrest and testify and the court is in charge of finding the criminal guilty or not by following strict procedures.

Answer 2

Actually, they do NOT tie in directly with the court. The police are part of the Executive Branch of the government, and the courts are the Judicial Branch (in the USA). The prosecutor is the ONLY possible tie, although the prosecutor truly works for the Legislative Branch (the people).