facility and likely something that will be looked into by an admitted angry attorney general barr. >> i was appalled and indeed the whole department was and frankly angry to learn of the mcc's failure to adequately secure this prisoner. >> reporter: attorney general william barr not mincing words today on the apparent suicide of multi-millionaire and registered sex offender jeffrey epstein in a new york city federal lockup. >> ewe're learning of serious irregularities that dpooe mand a thorough investigation. >> reporter: the inspector general and fbi launched investigations this weekend. the medical examiner performed an autopsy but is waiting for more information before releasing the cause of death. a source tells cnn it is believed epstein hanged himself while in a special housing unit