new york president donald trump pick fbi chief corporate lawyer christopher wray would likely face conflict interest agency due defense work many big company force step aside investigations legal ethics experts say wednesday spend many years government attorney early career wray past 12 years white- collar defense lawyer atlanta-based firm king spalding currently head government investigations practice investigations client need recuse steven lubet legal ethics professor northwestern university say firm wray graduate yale university law school defend johnson johnson janssen pharmaceutical unit justice department probe off-label use anti-psychotic drug risperdal also represent credit suisse csag.ul major tax prosecution justice department allege swiss financial group help clients hide offshore account internal revenue service accord king spalding website clients practice lead wray include deutsche bank cvs caremark general motor well fargo others clear wray personally represent company list kathleen clark professor washington university school law say professional ethics rule would specifically bar wray federal bureau investigation director participate investigations former clients share confidential information addition say federal regulations would prohibit participate matter opposite king spalding two years though government waive restrictions wray would first fbi director come private sector serve long private practice extensive corporate client base fbi chiefs jam comey man wray would replace work in-house lawyer lockheed martin hedge fund group bridgewater associate become fbi head 2013. robert mueller briefly work two law firm long stint government service become fbi director 2001.mueller conflict post-fbi law career emerge issue last month name special counsel investigate tie trump campaign team russia although fbi good know role fight violent crime espionage agency charge investigate corporate securities fraud recent years bureau launch probe corporations include glaxosmithkline takata corp result billions dollars criminal penalties neither wray king spalding respond request comment potential conflict fbi refer call matter justice department respond wray serve federal prosecutor atlanta 1997 2001. move u.s. department justice eventually become assistant attorney general head criminal division oversee fraud investigation enron join king spalding 2005. wray represent new jersey governor chris christie one time lead trump presidential transition bridgegate scandal addition king spalding partner bobby burchfield serve ethics adviser trust set january isolate president day-to-day operations trump businesses burchfield praise partner high integrity say saw conflict work wray serve fbi director lubet say think wray conflict would present unsolvable problem become fbi director note investigations could proceed field level without issue arise decisions make director level say event director recuse deputy directors say lubet trump fbi nominee 's corporate legal work could exclude probe