accomplice

• Meaning  -  partner in crime

• Synonyms -  confederate, associate, assistant, helper, decoy, steerer, supporter.

• Antonyms -  adversary, enemy, opponent.

• Usage -  Abu Allibi was an accomplice of Bin Laden.

• Remember -  accomplice ~ accompany + police; so accompany police implies helping police in reducing crime ; accomplice means opposite of this : partner in crime.