If you become aware that there is an active warrant out for your arrest, you should immediately contact a trusted criminal lawyer to ensure that you can safely turn yourself in without further incriminating yourself.
The criminal process cannot get initiated with the court system until the warrant is served on you and you are processed through the jail. It is important to remain silent at this point, allow a trusted criminal lawyer to arrange a turn into the jail at a time that is convenient to you, and to also appear at your bond setting to ensure that you get the lowest bond possible.