This can include probable cause for the arrest. Pursuant to Va. Code § 19.2-18 every conservator of the peace shall have authority to arrest without a warrant in such instances as are set out in Va. Code.Your Fourth Amendment rights may have been violated if evidence was collected against you without a warrant or probable cause. An officer has reasonable cause to believe an arrestee in custody for a felony, Class 1 or Class 2 misdemeanor, or a violation of an ordinance. The plaintiff's claim in a warrantless false arrest lawsuit arose from a sheriff s deputy s visit to her house to check on the welfare of her daughter. Virginia Code §19.2-81.3 allows a law enforcement officer to arrest someone without a warrant when certain laws are allegedly violated. And is this a false arrest if no charges were filed on the individual and they were let go? Your right to not be stopped on the assumption you are doing something illegal. The defendant filled out an incident report about the assault but did not assist in applying for the arrest warrant. Searches without probable cause or a warrant are illegal.