As long as he entered the country as a visitor with a B1/B2 visa, he is eligible to apply for adjustment inside the US if he is married to a US citizen. The I-130 and I-485 should be filed concurrently. However, if he had the preconceived intent to remain in the US permanently when he entered with his visitor visa, he may be found inadmissible for having committed visa fraud.
Answered on Apr 01st, 2013 at 9:22 PM