A presumed suicide shifts to foul play when a second dead body turns up.
A Seattle woman is brutally murdered near a homeless encampment.
A depraved killer snuffs out the life of a promising young schoolteacher.
A dead teen bound in chains is found drifting miles off the Jersey shore.
A suspicious 911 call leads to a student pinned to the floor with a knife.
A gruesome attack on a couple sets off a nationwide hunt for the culprit.