The judge had no sympathy for people who insisted on taking the law into their own hands. [=trying to punish criminals themselves instead of allowing the legal system to do it]法官不同情那些执意无视法律、执行私刑的人。

After months of waiting for something to happen, he decided to take matters into his own hands.等了几个月都没有结果之后，他决定亲自出马。