'Worst Roommate Ever': True crime docuseries dives into deadly living situations

The second season of "Worst Roommate Ever," released June 26 and garnering popularity on Netflix, delves into housing situations that reach their worst possible conclusion. 

A woman who poisoned her best friend for custody of her son; a terrifying tenant who murdered his elderly roommate after earning her trust; a woman who took out a life insurance policy on a roommate then left him with a traumatic brain injury; and a landlord who shot then disembodied his tenants are the subjects of the docuseries' four episodes.