Sorry criminal has identified missing head (7)
I believe the answer is:
ashamed
'sorry' is the definition.
(ashamed can mean sorry or remorseful)
'criminal has identified missing head' is the wordplay.
'criminal' is an anagram indicator.
'identified' becomes 'named' ('name' can be a synonym of 'identify').
'missing head' means to remove the first letter.
'named' with its initial letter taken off is 'amed'.
'has' is an anagram of 'ash'.
'ash'+'amed'='ASHAMED'
(Other definitions for ashamed that I've seen before include "Afflicted with remorse, feeling sense of wrongdoing" , "Not proud" , "Troubled by feelings of guilt or embarrassment" , "Embarrassed, sheepish" , "Embarrassed and Contrite" .)