new york former pharmaceutical executive martin shkreli collision course congress thursday lawmakers warn could prosecute contempt appear next week hear drug price lawyer shkreli inform u.s. house committee oversight government reform intent answer question ask excuse appear committee chairman jason chaffetz write letter date wednesday plan remain silent contrast shkreli prolific use social media outspoken twitter livestream video even indictment last month criminal charge securities fraud oversight committee subpoena shkreli appear tuesday discuss decision chief executive turing pharmaceuticals raise price life-saving medicine daraprim 5,000 percent shkreli 32 say would invoke fifth amendment right self-incrimination twitter tell followers disgust insult lawmakers try subvert right fifth amendment u.s. constitution say person shall compel criminal case witness himself dispute appear likely end one two ways shkreli appear washington tuesday invoke right shkreli stay home new york prompt committee vote hold contempt set potential criminal prosecution shkreli resign chief executive officer turing last month arrest fraud charge turing acquire daraprim 62-year-old drug cause public furor drastically increase price fight congressional testimony common especially potential witness face criminal prosecution testimony could late use well-known witness former irs official lois lerner former enron chief financial officer andrew fastow refuse answer question congress require appear person front lawmakers cameras invoke right unclear thursday whether shkreli would make trip release bond restrict certain part new york state require ask judge waiver travel one shkreli lawyers inform oversight committee shkreli take step seek travel waiver say rep. elijah cummings maryland committee top democrat plan try use intentional inaction kind bogus excuse show tuesday hear people see right juvenile tactic cummings say statement thursday chaffetz utah republican warn letter shkreli defense attorney baruch weiss shkreli could face criminal prosecution contempt fail appear mr shkreli uniquely qualify answer question rise prescription drug price chaffetz write threat prosecution theoretical 1952 mobster frank costello convict contempt congress fail appear witness say laryngitis chaffetz letter hold possibility compromise write committee may agree hear testimony non-public session immunize testimony could use criminal prosecution immunize testimony though would require support two-thirds committee complicate dispute shkreli decision week seek new lawyers replace team law firm arnold porter others still name criminal charge shkreli stem prior management hedge fund msmb capital management biopharmaceutical company retrophin inc rtrx.o prosecutors say shkreli engage ponzi-like scheme defraud hedge fund investors misappropriate 11 million assets retrophin repay shkreli also recently chief executive kalobios pharmaceuticals inc kbioq.pk plead guilty twitter call allegations baseless without merit drug exec shkreli lawmakers clash ahead congressional hear