culpable
adjective /ˈkʌlpəbl/
  /ˈkʌlpəbl/
(formal)- responsible and deserving blame for having done something wrong
- The accident was the result of a culpable failure to consider the risks involved.
 
Extra Examples- She believed him culpable of murder.
 - The prime minister is highly culpable in this affair.
 - You are equally culpable in this affair.
 
Oxford Collocations Dictionaryverbs- be
 - believe somebody
 - hold somebody
 - …
 
- equally
 - morally
 
- in
 - of
 
Word OriginMiddle English (in the sense ‘deserving punishment’): from Old French coupable, culpable, from Latin culpabilis, from culpare ‘to blame’, from culpa ‘fault, blame’.