US District Court Judge Dan Polster says he has done nothing to favor those seeking money from pharmaceutical industry as its lawyers accuse him of bias against drug makers

Expected filing comes after pharmaceutical company reaches tentative deal with thousands of local governments and more than 20 states, which could be worth up to $12 billion

Spokesman for Mortimer D.A. Sackler says disclosure by attorney general meant to 'torpedo a mutually beneficial settlement' over Purdue Pharma's alleged pushing of painkillers

Tentative agreement reached with thousands of local governments and more than 20 states, could be worth up to $12 billion over time

Family refuses to offer counter-proposal, expected to seek protection from courts as lawsuit against maker of addictive painkiller set to go ahead

Figures show Israeli pharmaceutical giant produced less than 1% of the 76 billion oxycodone and hydrocodone pills; Sackler-owned Purdue produced about 3% in 2006-2012

Billionaire family are owners of Purdue Pharma, whose painkiller OxyContin is subject of over 1,000 lawsuits for role in US addiction crisis

Drug company used Italian doctor, apparently employing practices that helped create US addiction crisis that has claimed 400,000 lives