No it isn’t. Law enforcement investigates after wrongdoing occurs and comes to to their attention. They investigate who did it, why, how, when, forensics, etc. They build a case and turn it over to a prosecutor for trial. They don’t just wake up one day, single someone out for no reason, and start investigating every aspect of the target’s life. If you seriously think LE conducts baseless investigations without probable cause that a crime has been committed, you are a sorry individual indeed.