A working group of attorneys general and banking officials from all 50 states has gathered evidence in its probe of potentially improper or illegal lending and servicing practices. The group met with representatives of five top mortgage lenders and servicers — GMAC/Ally, J.P. Morgan Chase, Citibank, Wells Fargo and Bank of America. "We are having ongoing discussions with these institutions. We have also met with groups of investors and a number of consumers … We are well under way with that process." The investigation came together quickly in the fall, after complaints arose about lenders and servicers using "robo-signing" practices...