The Cat Dancers
During the robbery of a mini market, the robbers murder the store clerk. A shot goes wild, causing a gas pump to explode. A woman and child in a van near the pump are killed.
The killers are caught almost immediately, and one confesses to the crime. However, the charges are dismissed on a technicality. Shortly after their release, videotape appears on the Internet showing one of the killers being executed in a homemade electric chair.