51.   52.   53.   (b)  which  is  disproportional  to  his  known  sources  of  income;  or       (c)  that  he  had  at  or  about  the  time  of  the  alleged  offence  obtained  an  accretion  to   his  pecuniary  resources  or  property  for  which  he  cannot  satisfactorily  account:     may,   if   proved,   be   taken   into   consideration   by   the   Court   as   corroborating   the   testimony  of  witness  in  the  trial.     (3)   The   court   shall   ensure   that   all   matters   brought   before   it   by   the   Commission   against   any   person,   body   or   authority   shall   be   conducted   with   dispatch   and   given   accelerated  hearing.     (4)  Subject  to  the  provisions  of  the  Constitution  of  the  Federal  Republic  of  Nigeria,  an   application  for  stay  of  proceedings  in  respect  of  any  criminal  matter  brought  under   this  Act  shall  not  be  entertained  until  judgment  is  delivered.     Offences   under   this   Act   shall   be   extraditable   under   the   Extradition   Act,   CAP   E25,   Laws  of  the  Federation  of  Nigeria,  2004.     (1)  The  Attorney  -­‐  General  of  the  Federation  may  request  or  receive  assistance  from   any   agency   or   authority   of   a   foreign   State   in   the   investigation   or   prosecution   of   offences  under  this  Act;  and  may  authorize  or  participate  in  any  joint  investigation  or   cooperation   carried   out   for   the   purpose   of   detecting,   preventing,   responding   and   prosecuting  any  offence  under  this  Act.     (2)   The   joint   investigation   or   cooperation   referred   to   in   sub-­‐section   (1)   may   be   carried   out   whether   or   not   any   bilateral   or   multilateral   agreements   exist   between   Nigeria  and  the  requested  or  requesting  country.     (3)  The  Attorney-­‐General  of  the  Federation  may,  without  prior  request,  forward  to  a   competent   authority   of   a   foreign   State,   information   obtained   in   the   course   of   investigation,  if  such  information  will  assist  in  the  investigation  of  an  offence  or  in  the   apprehension  of  an  offender  under  this  Act.     (1)   Any   evidence   gathered,   pursuant   to   a   request   under   this   Act,   in   any   investigation   or  proceedings  in  the  court  of  any  foreign  State,  if  authenticated,  shall  be  prima  facie   admissible  in  any  proceedings  to  which  this  Act  applies.       (2)  For  the  purpose  of  subsection  (1)  of  this  section,  evidence  is  authenticated  if  it  is  -­‐       (a)  certified  by  a  Judge  or  Magistrate  or  Notary  Public  of  the  foreign  State;  or     (b)  sworn  to  under  oath  or  affirmation  of  a  witness  or  sealed  with  an  official  or  public   seal  –     (i)  of  a  Ministry  or  Department  of  the  Government  of  the  foreign  State;  or         Extradition.     Request  for   mutual   assistance.       Evidence   pursuant  to  a   request.