In the southwest. this lake is 65 miles long, when it is full. but, boy, is it far from full. in fact, since this lake was first filled in the 1930s, the water level has never been lower. all of this should be covered in water. but it s not. lake mead is shrinking, an omen of an uncertain future as climate change fights and as that water level lowers, grisly discoveries from a dark past. just a short drive from sin city out here in the wilderness, this past saturday, may 7th, human skeletal remains spotted at a popular recreation spot. i think i want to leave. reporter: less than a week earlier, sunday, may 1st, another human body in a rusty barrel, in the mud. that is definitely and clearly a homicide investigation.