John H. answered 09/13/19
Certified Criminal Justice Instructor with 20+ years of experience
There's quite a few moving parts to answer this question. Basically, for a warrant to be issued, probable cause that a crime had been committed must be made. With that said, in order to obtain an arrest warrant, it would mean that more than likely, the person that committed the crime can be charged with a criminal offense. Swearing out a warrant is taken under oath, so if a person lied, they could be face being charged with a crime as well. An example would be filing a false police report. That's actually a crime, and I have charged people with it in the past.
For this arrest warrant, you would be arrested, processed in the local jail and have a hearing before a judge or magistrate. They would set a bond or possibly release you on your own recognizance (meaning you sign a form stating you promise you will appear). A court date would be set. Either you would hire your own attorney, or have one appointed if you can't afford it. You would simply need to prove the statements were false, and if successful, the charges would be dropped. However, the charge will still show up on your record, so you would need to file for an expungement. That would completely remove all charges and information from your record.
For your search warrant question, if the probable cause for the warrant was invalid, anything found during the search would be considered fruit of the poisonous tree and could not be used as evidence in court. These type of situations often result in all charges being dismissed.
I hope this answer helps.