Prosecuting Evil with Kelly Siegler

A torso found floating in Galveston Bay, Texas, leads to the arrest of billionaire Robert Durst.

When an elderly couple dies in their home in 1987, Houston police suspect foul play, but the case goes cold.

When a teenage track star sneaks out at night, she finds herself caught in a deadly love triangle.

When two girls are heinously murdered, Houston acknowledges they have a gang problem.

A grieving mother takes her own life, or so it seems.

In an exclusive Houston neighborhood, an entire family is found dead of an apparent murder-suicide.

Amy Robinson, a teenager with Turner's Syndrome, had just taken her first steps toward independence by getting a job at her local grocery store.

The search for a missing student yielded no returns until a shocking discovery.

A young man enters a wig shop, stabs three people and flees.

Prosecutor Kelly Siegler uses controversial tactics to demonstrate to a jury how a suburban mom could have planned, tortured, killed and buried her husband.