Criminal one captured by the force (5)
I believe the answer is:
thief
'criminal' is the definition.
(thief is a kind of criminal)
'one captured by the force' is the wordplay.
'one' becomes 'i' (roman numeral).
'captured by' is an insertion indicator.
'force' becomes 'f' (symbol used in Physics e.g. f=ma).
'i' placed into 'the' is 'thie'.
'thie'+'f'='THIEF'
(Other definitions for thief that I've seen before include "One who is fourth in line after a rich man" , "Burglar, say" , "'Taffy was a - - '" , "He takes" , "Aus. or Scots city" .)