Richard Harman Richard Harman

It looks like Rosie's friends know more about her murder than they're letting on.

In this sneak peek of The Killing's third episode, titled "El Diablo" (airing Sunday at 10/9c on AMC), Sterling (Kacey Rohl) can't contain her guilt.

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Even more suspicious? Jasper (Richard Harmon) chases after her. Yeah, he doesn't exactly look innocent, does he?

We won't say more. Check out the tease for yourself:

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