Hello my name is ***** ***** I am delighted to answer your questions today. I have 35 years experience as an immigration lawyer.
I am a different attorney than the one who answered above.
There is some matters that need to be clarified so that there is a clear understanding of whether your brother-in-law has in fact filed an immigrant petition for both his parents and his sister.
You state that he is " a medical doctor and has his permanent residency to stay and work in the US".
A permanent resident is not eligible to file an immigrant petition for either a parent or a sibling.
The law requires the adult child to be a US citizen to file for the parent and the law also requires the sibling to be a US citizen to file for a brother or sister.
If your in-law is a US citizen his parent is immediately eligible for an immigrant permanent resident visa and the process would take no more than 7-9 months.
It is a 12-13 year wait for the sibling to have a visa number available to her.
So the issue of the true status of your in-law needs to be determined before we can decide whether there is a possibility for a non-immigrant visa to be issued.
This issue is of utmost importance because you indicate the parents have been invited and given attention. You do not say what the attention was - a visitor visa? Or were the parents given an immigrant visa?
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