Surveillance video captured a fight on a Valley Metro train near Arizona State University before one rider was stabbed at least 14 times.
TEMPE, Ariz. — A 34-year-old woman is accused of stabbing another passenger at least 14 times on a Valley Metro light rail train in Tempe on Feb. 12, leaving the victim with life-threatening injuries and setting up a criminal case centered on surveillance video and a claim of self-defense.
Prosecutors have charged Allante Wallace with aggravated assault with a deadly weapon after the late-night fight on an eastbound train near Apache Boulevard and Dorsey Lane, close to the Arizona State University area. Police say the 42-year-old victim survived after emergency surgery. Wallace’s lawyer has argued in court that she was attacked first and acted because other riders were “just watching,” making the case an early test of how investigators, prosecutors and the court will weigh video footage, witness statements and the amount of force used after the fight began.
According to Tempe police records described in court documents, officers were sent to the light rail line at about 9 p.m. after reports of a fight on a train traveling east of the ASU campus. When officers reached the scene, they found a woman bleeding heavily from multiple stab wounds. Investigators later reviewed interior surveillance video that showed the victim board the train, sit across from Wallace and then move toward her seat. Police wrote that the two women had a verbal confrontation that turned physical. A witness told investigators the victim confronted Wallace before the assault. The affidavit says the victim was seen standing over Wallace and pulling her hair during the struggle. Police say Wallace then picked up a knife with a red handle from the floor of the rail car and began stabbing the other woman at close range.
Investigators said the video and witness accounts showed repeated blows after the struggle moved to the floor. Police wrote that several stab wounds were inflicted while the victim lay on her back in what they described as a defensive posture, with Wallace standing over her and using an overhead stabbing motion. Court records say the victim was stabbed in the left thigh several times, once in the right thigh, once in the left breast, twice in the left forearm, once in the right abdomen, once in the left armpit and twice in the jaw. Some reports summarized the total as at least 12 wounds, while the probable cause affidavit cited at least 14. The victim was rushed to a hospital for emergency surgery and later was reported in stable condition. Her name has not been released publicly. Police have also said it remains unclear where the knife came from before it appeared on the train floor during the fight.
The scene did not end when the stabbing stopped. Investigators say Wallace returned to her seat, gathered her belongings and walked off the train carrying the knife in one hand and a pizza box in the other. The probable cause affidavit says she also carried a white backpack featuring the cartoon character Dexter from “Dexter’s Laboratory.” That detail, odd on its face, became part of the identification trail described by police. The documents say the train’s camera system captured Wallace leaving the rail car with the items still in hand. Police later said Wallace left before officers arrived, but the case did not remain unsolved for long. After the confrontation, authorities say, Wallace contacted a defense attorney and eventually agreed to turn herself in with counsel. The affidavit says her attorney told police that Wallace had been attacked on the light rail, defended herself and left the train in shock. Investigators noted that Wallace declined to make further statements when she surrendered.
The legal dispute now turns less on whether Wallace stabbed the other rider than on how the law will interpret the moments before and after the knife appeared. At Wallace’s initial court appearance, her lawyer argued that she acted in self-defense after the victim started the fight and other passengers did nothing to help. He told the court, according to local television coverage, that Wallace “had no other choice.” But police records laid out facts that could complicate that argument, especially the claim that the stabbing continued after the victim released Wallace’s hair and fell into a defensive position on the floor. Under Arizona law, self-defense claims often hinge on whether the force used was immediately necessary and proportionate to the threat faced at the time. The public record so far does not show prosecutors adding attempted murder or other charges. Wallace was ordered held on a $350,000 bond, and available reports said no next court date had been listed publicly at the time those stories were published.
The location adds another layer to the case. The fight happened on the Valley Metro rail line that runs through Phoenix, Tempe and Mesa, including the busy Apache Boulevard corridor near Arizona State University. Valley Metro says its rail system spans 35 miles with 49 stations, and the agency says trains, stations and park-and-rides are equipped with security cameras that record activity around the clock. Those cameras now appear central to the criminal case against Wallace. Local reports placed the incident near the Smith-Martin and Dorsey/Apache stops, a heavily traveled stretch used by students, workers and residents moving through the east Valley. Police described the stabbing as an isolated incident arising from an argument between two women, not a random attack on multiple passengers. Even so, the lawyer’s account that bystanders watched without stepping in has become one of the most striking details in the story, because it frames both the defense narrative and the public unease that often follows violence on public transit.
What remains unknown is also important. Public records summarized in news reports do not explain what started the verbal confrontation, whether the women knew each other before boarding the train, or whether either had prior contact that night. Police have not publicly identified the victim or disclosed a fuller account from her about the exchange before the fight. Authorities also have not publicly explained whether any passengers tried to alert the operator, call 911 before the stabbing ended or physically intervene. The question of where the knife came from could become significant at later hearings. The affidavit says Wallace picked up a red-handled knife from the floor, but public accounts do not say who brought it onto the train or how it got there. Those unanswered points could shape both a self-defense claim and any future argument by prosecutors that Wallace used more force than the law allows.
The facts that are clear already paint a violent, compressed episode. Police say an argument began inside a rail car, turned physical within moments and left one passenger with wounds across her legs, torso, arm, armpit and jaw. Officers found the victim bleeding heavily when they arrived. Wallace, meanwhile, had already left. Within about a day, she was in custody. In local television coverage after the arrest, officials described the victim as stable and said the investigation remained active. The pace of that timeline matters because it suggests investigators moved quickly from a chaotic transit scene to an arrest built on video, witness accounts and the suspect’s surrender through counsel. For now, the public case file shows a serious felony charge, a high bond and a defense that is not denying the stabbing happened but insists the fight began with the other rider.
As of March 19, Wallace remained publicly identified in news reports as facing one count of aggravated assault with a deadly weapon in the Feb. 12 Tempe light rail stabbing. The victim survived, and the next major milestone is the next court setting or any new filing that clarifies whether prosecutors seek additional charges or whether Wallace formally presses a self-defense claim.