I understand that if one is caught in the act of comitting a crime no warrant is needed, but what if someone accuses you of comitting a crime such as theft $50-$500 how do they go about getting warrant and what is needed to get that warrant? I mean we cant just go to a police department and say Joe Blow stole this I want him arrested? If one is not caught in the act how can they be arrested for the accusation against them? If a cop thinks someone has comitted a crime but has no evidence how can they obtain a warrant? Do they have to fill out an affidavit? Does the cop have to show evidence or probable cause? And what would be probable cause of theft after the fact? Wittness? Items stolen? What if a cop lied on the affidavit?