警察啥也没帮她，倒是他老公跟警察有说有笑，警察还查了她的绿卡，说快到期了。
-After she files I-751 waiver, she will be legally to stay in US and work even if the conditional green card expires. By the way, if her husband has any violence to her, keep the evidences such as picture of wound, hospital Doctor's examination, witness, etc. Don't be afraid to depend her personal safety and interests.
Read these links about I-751 waiver filing:
http://www.nwirp.org/Documents/FillingAnI-751Waiver.pdf
(Read "How to Get a Waiver of the Requirement to File a Joint Petition" part in the above USCIS website)
