I know someone that has a warrant and want to turn her into the police what do i do?

The easiest thing to do is to call the law enforcement agency with jurisdiction in your location and let them know that you have information concerning the whereabouts of an individual with an outstanding warrant. They will ascertain information concerning their location, last time they were seen there, possible vehicle information, etc. Also, depending on what the warrant is for, you might just inform the wanted person that they have a warrant and see if they will take the proper steps to either turn himself in or clear up the warrant. If the warrant is a simple one for traffic offenses, it is highly likely that they will be able to pay the fine and then the warrant will be destroyed. On the other hand, if the warrant is for something more serious then you need to consider your options because if it is proven that you have knowledge of where the wanted person is, yet you do nothing about it....then the police could potentially come after you for aiding a fugitive...etc..etc...etc.