Four-and-a-half years after Travis Alexander died, his ex-girlfriend, Jodi Arias, was found guilty of first-degree murder. Arias came up with different versions of what happened. At first, she told police she knew nothing of the killing, then blamed it on masked intruders. At trial, she admitted to killing Travis, but claimed it was self-defense. “48 Hours" Correspondent Maureen Maher reports. This classic "48 Hours" episode last aired on 5/17/2013. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.

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