The  Mens rea  of  murder  in  Iranian  law , by  following  of  Imamie  Jurisprudence , is  declared  in  three  sections  in  the article 206 of  Islamic  penal  code. Section  "A"  of the  article 206 stipulates  the  absolute  murder.  for  absolute  murder , the  murderer  must be  deliberate  in  both  act  and  result. according to  this  section , the  accomplishment  of  the  murder , is  depend  on  " intention  to kill  Some  definite  one  or indefinite  individual  or  individuals  of  a  group". it  seems  that  " definite"  in   this  section  means  determination  in  targeting  but  in  identity; because  in  addition that " indefinite  individual  or  individuals  of  a  group"  implies, the  section  "A"  of  article  295  and  article  296 of  Islamic  penal  code  also  support  this idea; so, by rule, only mistake  in  targeting  may  causes  exclusion  of  being murder; but judicial procedure of Iran holds also that mistaking in identity causes exclusion of being murder.  

In sections "B" and "C" of article 206 Of Islamic  penal code,  committing  a  fatal  act  against  victim  sets in  place  of  the  offenderُs  determinent  malice  and   is  regarded  as  Mens  rea of  murder.

The  Mens rea of murder in English  law  is similar  to  that in Iranian  law; because "Malice aforethought" which  inquires "intent  to kill"  and "intent  to  impose  serious physical  harm"  constitutes  the  Mens  rea  of  murder.

Considering  to the  condition  of  determination of  the  killed  in  article  206  of  Islamic  penal  code  and  considering  to  article 296  of  the  same code, as well as current  judicial  procedure  of  Iran,  it  may be  suggested  that  mistaking  in  intention ( whether  person  or  identity) causes  that  commission  is  regarded  Manslaughter, not  murder; whereas in English  law  by  applying  the  " Transfered malice"  rule and  some other  conditions,  the  commission   is  regarded  murder