Redhanded

Sami caught Layla redhanded.

John walked into his room and almost caught Jessica redhanded.

Never seen 'im but onct—mought be a redhanded 'sass'n—ur a thief—ur—ur—ur anythin'!

...the prosecuting attorney referred to the defendant as a “murderer” in one instance, and in another as a “redhanded murderer.”

No, Yellow Hat had stupidly, I'm sure, jailed me in Fate's main vault!; he'd put a redhanded thief rover adrift but jailed in a warehouse of his main desire.