20/20 on ID Presents: Homicide

In, Bloomington, Ill., a woman and her three children are murdered.; authorities delve into the mystery of who committed this heinous crime which points close to home, but all is not as it appears.

Dr. Amy Bishop shoots and kills three of her colleagues after being denied tenure, then investigators learn Bishop killed her brother with a shotgun 24 years prior, prompting many to ask if the tragic deaths could have been avoided.

A trail of death follows a couple intertwined in love, secrets and partnership; dark and mysterious questions loom after a new life begins thanks to a stolen identity.

A young woman who has good looks, brains and talent is found murdered, leading to the discovery that she has been leading a double life.

The terrifying and macabre story of Kraig Kahler who killed his family a few days after Thanksgiving in 2009.

A socialite is murdered in Memphis, Tenn., leading investigators to question suspects who have become ensnared in a tangled web of money, drugs and revenge, but the answers to this mystery may lie closer to the crime scene.

Sixteen-year-old Selena Stoian is left to piece together what went wrong with her family in such a short period of time when she finds her mother, Maria, dead and father, Stefan, missing.