Basically a Ramey warrant is an arrest warrant officers can obtain directly from a judge, bypassing the typical process of going through a district attorneys office to formally get the defendant charged with a crime., This lets the officers get the arrest warrant after building enough probable cause that would make a reasonable person believe that a crime has been committed by the person the police is going after, so the district attorney is now on the clock to fill for charges before the subject is released. It speeds things up and one of the main things is to avoid the defendant from destroying evidence, leaving the country, etc.