Podcast:48 Hours Published On: Sun Dec 22 2019 Description: Three murders in Austin, Texas, and little evidence to go on. Did a man testing a thermal imaging camera inadvertently capture the image of one of the killers? "48 Hours" correspondent Maureen Maher investigates.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.