$8,000.00 tax credit to first time home buyers before nov 30th? if i owe back child support. will i still get?

it? my sister and brother in law just bought a house. 1st home. he owes back child support. will they still get this tax credit or will it be deducted when they do their taxes and go to the mother of his children?
Update: haha ms. angel. i agree. they are renting to own though.
7 answers 7