A friend had about $100,000 of flat roofing done to his business by a illinois roofing company,it has been verified that it was installed improperly and leaks by an independent sources as well as the manufacture of the product confirmed as well.The contractor is not insured to do any type of commercial flat roofing work, only shingle residental. Also the Insurance company said we have to sue the contractor and they are not liable at all for this work. We also know contractor lives in million dollar house in barrington, he only deals in cash, uses undocumented workers, does not 1099 any sub contractors, easily buys 2-3mill of material a year. and cashes all checks at a currency exchange,lies about his business income taxes, says he is broke and will declare bankruptcy. what should hapn?