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Prosecuting Evil with Kelly Siegler

Series· 2023· Crime

Prosecuting Evil with Kelly Siegler is a new true-crime series examining the most harrowing homicides and toughest trials in Texas history — all told with Kelly Siegler's unique insight and unparalleled access.As Chief of Special Crimes in the busiest courthouse in the Lone Star state, Kelly Siegler battled to get killers into courtrooms and faced off with their formidable defense attorneys. Alongside the case investigators and victims' families, Kelly draws on her own extensive experience, the prowess of her fellow state prosecutors and the expertise of skillful defense attorneys to go beyond the headlines and reveal how perpetrators were brought to justice: Texas style.

Prosecuting Evil with Kelly Siegler Season 3, Episode 3, “The Tourniquet Killer,” airs Saturday, October 17, 2026 on Oxygen True Crime.

Next episode

Tomorrow

S3 E3

The Tourniquet Killer

9:00 PM ET

Airs on

Oxygen True Crime

Up next
S3 E4 · Triangle Of Guilt

Where to watch in the US

Latest season’s US availability not verified

We haven’t verified current watch options for the latest season. Check the service’s episode list.

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Release details

Known dates and milestones

  • Released

    Premiere

    Since Oct 3

Dates & episodes

Season guide

Current and recent seasons first. Original premiere dates, not current availability.

  1. 3Season 3Next: Episode 3 · The Tourniquet Killer
  2. 2Season 2Original premiere · Oxygen True Crime
  3. 1Season 1Original premiere · Oxygen True Crime · 10 episodes

Episode guide

Season 3 episodes

View season

Premiere dates and destinations, not current availability.

  1. 1

    The Texas Seven source at TVmaze

    Originally aired on Oxygen True Crime

  2. 2

    Deadly Deception source at TVmaze

    Originally aired on Oxygen True Crime

  3. 3

    The Tourniquet Killer source at TVmaze

    Airs on Oxygen True Crime

  4. 4

    Triangle Of Guilt source at TVmaze

    Airs on Oxygen True Crime

Episode data from TVmaze.

Cast and crew

Cast
Kelly Siegler
Produced by
Casey Kriley, Dick Wolf, Kelly Siegler, Tom Thayer
About this information

Sources and attribution

Supporting links and attribution for the dates, credits, schedules and watch options shown on this page.

  • Season premiereOctober 3, 2026
    ReportedTVmaze
    “TVmaze: Prosecuting Evil with Kelly Siegler season 3 episode 1 "The Texas Seven" airs 2026-10-03 on Oxygen True Crime”
  • Cast and crew data

    TVmaze · CC BY-SA 4.0

  • Next episode schedule

    TVmaze · normalized by Release Night · CC BY-SA 4.0

  • Season release history

    TVmaze · 3 season records · CC BY-SA 4.0

Release dates retain the source wording. Season history records original premieres; availability receipts identify options that can be used now or later.

Past changes1 update

  1. Season premiere date announced: October 3, 2026

    Reported by TVmaze

How Release Night verifies and updates information