The Perfect Murder

When a woman finds her daughter strangled to death in their Staten Island, N.Y., home, computer technicians uncover a dangerous online dating habit, but the real killer lies much closer to home.

When a single mother is stabbed to death in her home in Cape Cod, Mass., the numerous suspects include her child's father, his wife and her eccentric father's young girlfriend.

In Bronx, N.Y., police investigate the murder of 20-year-old Kimberly Antonakos who was set ablaze while still alive.

When a businessman is shot to death outside his Bronx office, police must determine whether he arranged the hit to provide for his family or whether his wife killed him for the insurance money.

A Milwaukee mother is murdered in 1981. Her sons describe a masked man with a ponytail fleeing the home. Was it her bitter cop ex-husband? Or a neighbor who claims his gun was stolen? Police make a shocking arrest, but some have doubts to this day.

An Exxon oil executive goes missing in front of his New Jersey home. Police fear a medical emergency until a ransom note arrives from an eco-terrorist organization. As the case stretches on, the kidnappers' behavior grows more and more baffling.

In Gulfport, Fla., Detective Larry Tosi investigates the stabbing death of Karen Gregory; after he enlists the help of his firefighter friend, George Lewis, the case takes a shocking turn.

The case of former Marine Kevin Green, who was convicted in 1980 of a vicious 1979 assault on his wife that took the life of their unborn daughter. He was exonerated in 1996, however, when DNA evidence linked another man to the attack.

A maid finds a woman dead in Room 305 of an Oregon hotel. Her grieving husband reveals an open relationship- was an affair to blame? Or had this Ivy League grad fallen into a life of drugs? Then a prostitute comes forward with a shocking revelation.

An Orlando mother goes missing fifteen years after her abusive husband left for good. Did he return for revenge? Did she flee from the law after collecting his social security all these years? Do her grieving children know more than they're saying?