culprit

Used to emphasize the true source of the problem.

Used to emphasize the actual source of the problem.

Refers to the main person or thing responsible.

Refers to the primary person or thing responsible.

Refers to the most significant cause of a problem.

Refers to a significant person or thing responsible.

Refers to the most severe cause of a problem.

Indicates the person or thing clearly responsible.

Refers to the main person or thing responsible.

Indicates the person or thing probably responsible.

Refers to the foremost person or thing responsible.

Indicates a person or thing that might be responsible.

To locate or identify the person responsible.

To capture or find the person responsible.

To recognize and name the person responsible.

To find the person responsible after a long search.

To find out who the responsible person is.

To search for the person(s) responsible.

To search for the person(s) responsible.

A formal term for catching or arresting the person responsible.