> But even for employment based or marriage based green card
> applications, wouldn't he have to explain his overstay first.
You are correct. If he hopes to work illegally here on his visitors visa, have the employer file for a green card and wait the necessary times out, he is making a grave mistake.
Just yesterday, I talked to someone who had all the ingredients for a sucessful immigration (mother is US citizen I130 pending for many years, highly trained professional) until 1 year ago when she decided to overstay a student visa for >365 days and f__ up her life beyond repair.
> BTW, he has not completed one year yet.
THIS IS NOT LEGAL ADVICE: If he managages to weasel out of the country without surrendering his I94 and to have a continuous CV in his homecountry, he might be be able to get away with this idiotic act. END OF ILLEGAL ADVICE.
> And I told him about the 10 year ban on completing one
> year of overstay.
Well, at this point he already might have a 3 year ban. But it is surely easier to wait out 3 years than 10 years.
> As I understand it, any application he submits would have to be
> under some sort of amnesty scheme for illegal aliens.
Under some FUTURE amnesty scheme. All the previous 'amnesty' schemes have pretty much expired, as he came into the country after december 21st 2000 he doesn't even qualify for the last one (245i). Currently, there is no way to adjust status with significant overstay except for the ones already mentioned by Jim Mills (mainly asylum).
Btw. employers will say 'we will get you a green-card' in a heartbeat. They usually have no idea what it entails today, (maybe they remember the 70s when getting a GC for an employee was a matter of months, not years like today.)