First, you must obtain a police certification asserting that you have been the victim of a crime and you have cooperated with law enforcement. Then, you will need to apply for the U visa with the department of immigration. With the U visa application, you will be able to apply for a waiver of all the reasons why you could be deportable. The U visa application form is the I-918. When the visa is approved, you will receive an employment authorization valid for 4 years. After 3 years, you will have the opportunity to apply for residency through the adjustment of status process.