The Internal Affairs investigator in charge of Allen's case told Montoya about the missing bullet and suggested Corrigan's connection to its disappearance. Montoya found Corrigan and forced him to reveal the location of the bullet. After it was recovered, Allen was allowed to return to active duty. However, Montoya's actions destroyed an ongoing Internal Affairs investigation into Corrigan's misconduct. This left Allen angry and disappointed in her because he had secretly started his own investigation of Corrigan, which Montoya's actions also compromised. Allen continued his investigation (which took place during the events of "Infinite Crisis"), but Corrigan was tipped off. Corrigan found Allen's informant and beat him to death. Corrigan let Allen find the informant's body before shooting Allen in the back and killing him (in "Gotham Central" #38). By tampering with the evidence at the crime scene, Corrigan managed to evade prosecution. Allen's unavenged death pushed Montoya to an emotional breakdown, and she subsequently decided to quit the force in disgust at the system.