caught red handed，當場抓獲。
Which means somebody who was trying to take something or steal something was caught at act.
so they were seen actually doing it.that is called 'caught red handed'.
意味著某人想拿東西或偷東西時，被當場抓住。
所以，他們實際上被人看見了正在做賊，這就叫「當場抓捕」。
They caught the thief red handed.他們當場抓住了賊。
The smoking patrol has caught
two men red handed smoking in a public area.
這個吸菸巡邏隊已當場抓住兩個在公共場合吸菸的男子。
patrol，巡邏隊。