| RRandall AdamsSelf | Self |
| DDavid HarrisSelf | Self |
| GGus RoseSelf - Homicide Detective in Dallas | Self - Homicide Detective in Dallas |
| JJackie JohnsonSelf - Homicide Detective in Dallas | Self - Homicide Detective in Dallas |
| MMarshall TouchtonSelf - Homicide Detective in Dallas | Self - Homicide Detective in Dallas |
| DDale HoltSelf - Internal Affairs Investigator in Dallas | Self - Internal Affairs Investigator in Dallas |
| SSam KittrellSelf - Police Detective in Vidor | Self - Police Detective in Vidor |
| HHootie NelsonSelf - Friend of David Harris in Vidor | Self - Friend of David Harris in Vidor |
| DDennis JohnsonSelf - Friend of David Harris in Vidor | Self - Friend of David Harris in Vidor |
| FFloyd JacksonSelf - Friend of David Harris in Vidor | Self - Friend of David Harris in Vidor |
| EEdith JamesSelf - Defense Attorney | Self - Defense Attorney |
| DDennis WhiteSelf - Defense Attorney | Self - Defense Attorney |
| DDon MetcalfeSelf - The Judge | Self - The Judge |
| EEmily MillerSelf - Surprise Eyewitness | Self - Surprise Eyewitness |
| RR.L. MillerSelf - Surprise Eyewitness | Self - Surprise Eyewitness |
| EElba CarrSelf - Employee at Fas-Gas | Self - Employee at Fas-Gas |
| MMichael RandellSelf - Third Surprise Eyewitness | Self - Third Surprise Eyewitness |
| MMelvyn Carson BruderSelf - Appellate Attorney | Self - Appellate Attorney |
| RRon AdamsSelf - Randall Adams' Brother (archive footage) | Self - Randall Adams' Brother (archive footage) |
 John DillingerSelf - Gangster (archive footage) | Self - Gangster (archive footage) |
| JJames GrigsonSelf - Texas Forensic Psychiatrist Prosecution (archive footage) | Self - Texas Forensic Psychiatrist Prosecution (archive footage) |
| MMark MaysSelf - Murder Victim (archive footage) | Self - Murder Victim (archive footage) |
| DDouglas MulderSelf - Dallas Prosecutor (archive footage) | Self - Dallas Prosecutor (archive footage) |
 Anna SageSelf - Informant in John Dillinger Case (archive footage) | Self - Informant in John Dillinger Case (archive footage) |
| TTeresa TurkoSelf - Dallas Police Officer (archive footage) | Self - Dallas Police Officer (archive footage) |
| HHenry M. WadeSelf - Texas District Attorney (archive footage) | Self - Texas District Attorney (archive footage) |
| RRobert WoodSelf - Murdered Dallas Police Officer (archive footage) | Self - Murdered Dallas Police Officer (archive footage) |
 Errol MorrisSelf - Interviewer (voice) (uncredited) | Self - Interviewer (voice) (uncredited) |
| AAmanda CaprioPopcorn Lady at Drive-In - Re-Enactments | Popcorn Lady at Drive-In - Re-Enactments |
| MMichael Cirilla2nd Interrogation Officer Jackie Johnson - Re-Enactments | 2nd Interrogation Officer Jackie Johnson - Re-Enactments |
