Culprit and Yardbird

Culprit noun - A person who has committed a crime.

Yardbird and culprit are semantically related in person responsible for wrongdoing topic. In some cases you can use "Yardbird" instead a noun "Culprit".

Yardbird noun - A military recruit who is assigned menial tasks.

Culprit and yardbird are semantically related in person who breaks the law topic. You can use "Culprit" instead a noun "Yardbird", if it concerns topics such as person jailed for crime.