Those who dare to insult George Clooney’s latest squeeze, Sarah Larson, run the risk of being investigated by the Oscar-winning hunk, reports.

Clooney tells next week’s edition of the New Yorker he had his police-officer driver launch a probe of a mysterious caller who phoned him at home, urging him to dump Larson — a message that didn’t sit well with the former Vegas cocktail waitress.

On the voice mail, a calm, middle-age male voice is heard saying: “Dude, your friends asked me to give you a message: Dump the bitch before you’re sorry!”

With the help of his rent-a-cop chauffeur, Clooney had the caller’s number traced to a pre-paid cellphone, then tried to find out if the suspect had paid by credit card to pin him down. But the investigation apparently dead-ended.