Dai-Long Lang
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This article contains information from the unofficial English translation patch for Gyakuten Kenji 2.

Owing to the lack of an official translation of the Japan-only Gyakuten Kenji 2, the information and names in this article come from the unofficial English translation patch known as Ace Attorney Investigations: Miles Edgeworth: Prosecutor's Path. More information on this can be found here.

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Dai-Long Lang was a well-known detective in Zheng Fa who was the father of Shi-Long Lang and the head of the House of Lang until his death. Dai-Long was the head investigator of the SS-5 Incident, but the case would ultimately cost him his career and tarnish his family's name.

Involvement in the SS-5 IncidentEdit

Main article: SS-5 Incident
Teikun n lang

Shaking hands with Di-Jun Huang.

The SS-5 Incident began when the president of Zheng Fa, Di-Jun Huang, was apparently kidnapped on February 9, 2007. Dai-Long Lang, as the top investigator in his country, was called upon to head the case. The kidnappers demanded a high ransom, which they received, and the president was released and returned unharmed. However, the police found the body of Jack Cameron, a photojournalist, near the Happy Family Home orphanage where the kidnapping has taken place.

The murder investigation started at around 10:00 on the following day. They arrested the only suspect they had, the head of the orphanage, Patricia Roland. While investigating Cameron's body, the investigators found many inconsistencies, including the victim's bloodstain on the snow being apparently cut off and the victim's shoes not matching his shoe size. They also found a single photo on Cameron's camera, which showed an individual aiming a pistol at the president just outside the gates to the orphanage.

The prosecutor in charge of the investigation was Blaise Debeste. Unbeknownst to Lang, he conspired with Roland and one of Huang's body doubles to kill the real president and replace him with the double. Debeste manipulated the evidence, replacing the samples in the blood tests so that Huang's blood could not be recognized. The photo which the investigators found was prepared beforehand, staged with the fake president and Roland in a trenchcoat. Debeste's manipulation of the evidence allowed Roland to escape conviction and be declared innocent in court, and he then blamed the police for failing to collect decisive evidence, thus tarnishing Lang's reputation and that of his family.

Lang realized that the prosecutor was corrupt and that he must have tampered with the evidence, yet he couldn't do anything about it. However, he did find a drawing by one of the children at the orphanage which apparently depicted Huang with the assassin Sirhan Dogen. Lang recorded the boy's testimony, but agreed to keep his identity anonymous in order to protect him from Roland. Lang finally realized that the real Di-Jun Huang had been assassinated and that the current president was an imposter, but he decided to keep the truth a secret in order to prevent chaos. Dai-Long Lang took this information to the grave, and it would not be until 2019 that the truth behind the SS-5 Incident would be revealed.


  • His Japanese family name ("Rou") means "wolf".
  • Lang's Japanese given name "Dairyuu" roughly means "big dragon".
  • "Dai-Long" is derived from "Dà Lóng", the Chinese reading of his Japanese name, and he retains this name in the unofficial English fan translation patch for Gyakuten Kenji 2.
Gyakuten Kenji 2 characters
Ally · Anubis · Regina Berry · Larry Butz · Jack Cameron · Justine Courtney · Jill Crane · Dali · Blaise Debeste · Sebastian Debeste · Shelly de Killer · Desirée DeLite · Ron DeLite · Sirhan Dogen · Gregory Edgeworth · Miles Edgeworth · Jay Elbird · Kay Faraday · Dick Gumshoe · Dane Gustavia · Katherine Hall · Lotta Hart · Pierre Hoquet · Di-Jun Huang · Di-Jun Huang (body double) · Karin Jenson · Simon Keyes · Horace Knightley · Rip Lacer · Dai-Long Lang · Shi-Long Lang · Amy Marsh · John Marsh · Jeffrey Master · Missile · Money · Penny Nichols · Winston Payne · Will Powers · Regent · Rocky · Patricia Roland · Ethan Rooke · Frank Sahwit · Delicia Scones · Raymond Shields · Ema Skye · Nicole Swift · Franziska von Karma · Manfred von Karma · Bonnie Young
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