What happens if a Person spent money on good things which are earned from bad ways

Think That , a person is selling liquor or weapons , Now he has done the business some time and now he is a very rich person . According to Buddhism Selling liquor and weapons are bad businesses . Now he is spending money for good things ;) Ex:- doing lots of charity work . So now what will happen . If he did more good things more no harm will come for him ? Can you explain me this :) Thanks in advance.