An all new '48 Hours' Saturday March 16, 2019

48 HOURS on CBS. The next episode is called, "The Shape of a Killer" that will air this Saturday at 10/9 p.m. 

CBS says, "Three murders in Austin, Texas, and little evidence to go on. Did a man testing a thermal imaging camera inadvertently capture the image of a killer? 48 Hours -- correspondent Maureen Maher investigates."