The US embassy is asking for my family's passports back after stamping the immigration visa. What can be the reason?

There could be a number of reasons. There is no way for me to determine that reason based on the minimum facts provided.

Because you are no longer in the program for which you were granted a visa you are not in compliance with the terms of the visa and you must leave...

Can a company face problems firing new Green Card holders?

You have not provided sufficient information. There are many reasons why a company may need to lay people off.

Under which circumstances can a legal resident sue her financial sponsor?

I assume your mother-in-law is an LPR. She is free to move and work where ever she wants. If she is being abused I would cal the police.

Crossing into Canada with "restrictions F" on my licence, SR-22?

I agree with my colleague. You may need to take care of the financial responsibility.

Should I leave?

Because you are in removal proceedings, if you leave you will be considered to have voluntarily deported your self. Secondly if you leave without...

How long does it take to invite foreign son as a Green card recipient?

The visa bulletin is found at; https://egov.uscis.gov/cris/processingTimesDisp... how long it will take depends on your son's country of origin.

Do I have to inform uscis about arrest even if the case was dismissed and this happened after fingerprints and application?

Yes and provide certified copies of the original police report record and final disposition. In any portion of the record no longer exists you must...

Can an alien pending an asylum referral case under immigration judge travel to Puerto Rico with NY driving license?

The original asylum application has been denied and the immigrant is in removal proceedings. He is requesting defensive asylum as a defense to...

Voluntary departure for visa overstayer?

No. He does not need voluntary departure. He is free to leave the USA and will only be questioned upon leaving if he has an outstanding warrant....