To set a thief to catch a thief, that is what we call “to counteract one toxin with another”.

叫小偷去抓小偷， 这就叫 “以毒攻毒”。

《新英汉大辞典》

When the Myers realized that the bag was missing, they decided to check the picture that was taken some minutes before and as they suspected, they did catch the thief on a camera.

当梅尔一家意识到包不见了，他们决定看看几分钟前拍摄的照片，正如他们所怀疑，他们真的在相机上看到小偷在偷他们的东西。

youdao

Duck: you are a thief. Why don't you catch that bird?

鸭子：你个小偷。你为什么不抓那只鸟？

youdao

If someone told you that your most valuable business assets could be stolen in a minute and that it would be almost impossible to catch the thief or even figure out what had been stolen, would you believe it?

FORBES: Can You Keep a Secret? Protecting Your Business's Most Valuable Asset