在网上看到一篇关于卡恩性侵案的U Visa的讨论，不是特别明白，尤其是这一句：

"Even if the Manhattan DA’s office dismissed the indictment, it should not shy away from certifying that Ms. Diallo was helpful for purposes of the U visa."

http://www.abilblog.com/1/category/dsk/1.html

"Ms. Diallo can also seek a U visa if all else fails and her back is pushed against the wall. To qualify for the U visa under Section 101(a)(15)(U) of the Immigration and Nationality Act, the foreign national must demonstrate that she “has been helpful, is being helpful, or is likely to be helpful” to the prosecutor in addition to demonstrating substantial physical or mental abuse from the criminal activity. After all this, one’s instinctive reaction is that Ms. Diallo was not helpful to the prosecution in investigating or prosecuting criminal activity that would qualify one for the U visa, such as a rape or related sex offenses. The applicant must also possess "credible and reliable information that he or she has knowledge of the details concerning the qualifying criminal activity upon which his or her petition is based." See 8 C.F.R. 214.14(b)(2). However, in the U visa immigration context, it can be argued that she was helpful to the prosecution, despite her many inconsistencies, but it was ultimately the prosecutor’s office that decided to drop the case as they could not prove to a jury beyond a reasonable doubt that the offense was committed. A careful read through the motion to dismiss does not suggest that the prosecution was convinced that criminal activity did not occur in the hotel room. A U visa applicant should not be deprived of this benefit only because the prosecution ultimately decided, based on the flaws in the case, that it could not take the case forward in a criminal proceeding under a higher "beyond a reasonable doubt" standard. Also, the grant of a U visa ought not to be based on whether the victim was able to prove the charges against the accuser. Thus, even if there is an acquittal against the defendant who is found not guilty, the U visa ought to still be approved for the crime victim who was helpful to the prosecution, even though unsuccessful. Moreover, the U visa depends on whether the prosecutor will sign the crucial certificate of helpfulness that provides the basis for a successful U visa application. Even if the Manhattan DA’s office dismissed the indictment, it should not shy away from certifying that Ms. Diallo was helpful for purposes of the U visa. This is the least that Cyrus Vance can do if Ms. Diallo needs to remain in the United States. Such a gesture would also provide some encouragement for other immigrants to come forward who have been victims of sex offenses."