purchasing a meth house

[LuAnn Vigen]

My brother in law just bought a house from a private party, he plans of flipping the house. The house is full of used needles and he thinks (doesn't  know for sure) that meth was used in the house. Is this a problem or can he just flip it, does he need special permits? When he sells it does he have to disclose anything?

Any insight from someone who has dealt with this type of situation would be appreciated.