climate change. here is the story from nick watt. lake mead is slinking, an omen of about uncertain future as climate change bites, and as that water lowers, grisly discoveries from a past. this past saturday, may 7th, human skeletal remains spotted at a popular recreation spot. the second guess bringing your kids out here anymore. i think i want to leave. reporter: less than a week earlier, sunday may 1, another human body in a rusty barrel in the mud. this is definitely and clearly a homicide investigation. reporter: because in that decomposing body they found a gunshot wound. we believe the incident occurred in the late 1970s to early 80s, and we re basing that upon footwear and clothing that the victim was found wearing. and we know that that footwear and clothing was sold at kmart