Six Degrees of Murder

Forty-two-year-old single father of four Richard Mannion is found shot to death in his home, and police suspect he may have been looking for love in all the wrong places.

Elizabeth Palmer works with Matt Scott in Southern California's housing industry, then their bodies are discovered side by side in their office, and investigators are initially stumped by their gruesome execution-style killings.

Greg May, 56, is getting ready to move to Florida with a new girlfriend when he vanishes without a trace; police aren't sure if the tattoo artist turned Civil War collector is alive or dead until their investigation uncovers a horrific plot.