Season 4

In Texas, the body of Dr. Joseph Sonnier is discovered face down in the garage of his home.

Kendra Hatcher, a renowned pediatric dentist, is shot to death in the enclosed parking lot of her Dallas apartment.

A successful physician with a TV career ahead of her is bludgeoned to death in her Florida home.

A mysterious 911 call alerts the police to the murder of a Harvard graduate.

In Florida, a cell phone could help solve a case involving the torture and murder of a man.

A suitcase found in Connecticut contains a macabre and tragic discovery.

In Anchorage, a public health nurse goes missing, and the investigators get help from a terrified neighbor.

In Alaska, police fear a serial killer is on the loose, murdering native women.

In New Jersey, a woman is violently stabbed in her house.

Niagara Falls investigators find a serial monogamist slaughtered to death.

An enraged killer attacks 26-year-old Alexandra Ducsay, an aspiring artist with a big heart and a blossoming career.

Terri Brooks, assistant manager of a Pennsylvania restaurant, is brutally murdered after being robbed.

A gunman shoots William Walker, lieutenant of the Cleveland Fire Department, in his own driveway.