Lack of answers in her daughter's murder force a mother to embark on a years-long quest to change nationwide laws that finally allow her to catch a killer.

The suspect pool grows when one women steps in to help the investigation into the murder of her younger sister. A break in the case comes when she and her family pressure the state to follow important evidence.

When a single mother with a 4-year-old daughter is murdered, the case threatens to go cold - until the little girl grows up and vows to get justice.

A Southern California college freshman is gunned down in her family's home, and her older sister won't rest until she finds the people responsible.

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A killer lurks nearby as a Texas woman and her two grown daughters try desperately to piece together what happened when her eldest daughter is found murdered.