They caught the thief red handed.

他们当场抓住了贼。

The police caught the thief red handed.

警察当场捉住了那个盗贼。

The smoking patrol has caught two men red handed smoking in a public area.

这个吸烟巡逻队已当场抓住两个在公共场合吸烟的男子。

I think my boyfriend is having an affair, so I want to go home and catch him red handed.

好像我男朋友有外遇了，我要回家抓他个正着！

Within minutes there were half a dozen police cars in the area plus helicopters and an armed response unit. They caught the burglars red handed.

几分钟之内六辆警车赶来，外加几架直升飞机和还有武装反应队。他们把小偷逮个正着。