He slams the van door.
Her arms are crossed.
He wipes his nose.
She yawns.
He touches her arm.

Did you notice these tiny details in the newly released video that shows Gabby Petito and her then-fiance Brian Laundrie just before she was murdered in Wyoming?

Body language expert Susan Constantine breaks down all the tiny signals that Gabby and Brian appear to be displaying in surveillance video from a supermarket, apparently recorded just hours before her death.

Don't miss the HLN Investigation: "Toxic Love: The Gabby Petito Tragedy" -- Saturday, Nov. 5th at 9pET/PT only on HLN.

HLN: True Crime and Headlines

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