Catch someone red-handed: catch someone in the act of doing something wrong
Mom: Aha! I caught you red-handed! You’re trying to eat some cookies before dinner, huh?
Son: ….uh, no….
Mom: Don’t lie. I’ve caught you!
Catch someone red-handed: catch someone in the act of doing something wrong
Mom: Aha! I caught you red-handed! You’re trying to eat some cookies before dinner, huh?
Son: ….uh, no….
Mom: Don’t lie. I’ve caught you!