An Arizona woman is facing charges after allegedly stabbing a fellow train passenger over a dozen times following an altercation, police report. Her attorney asserts that she acted in self-defense, claiming she had “no other choice” as bystanders aboard the train simply observed without intervening.

Allante Wallace, aged 34, has been charged with aggravated assault with a deadly weapon in connection to the February 12th incident, as detailed in court documents accessed by Law&Crime.

According to the probable cause affidavit, Wallace allegedly used a “steak knife” to stab a 42-year-old woman at least 14 times. After the attack, she reportedly returned to her seat, collected a “pizza box” and a Dexter’s Laboratory cartoon backpack, and exited the train. The incident was captured by the train’s interior surveillance cameras, the affidavit states.

The affidavit describes Wallace leaving the light rail car with the knife in her right hand, a pizza box in her left, and carrying a white backpack featuring the “Dexter’s Laboratory” cartoon character.

The confrontation occurred on an eastbound Valley Metro light rail train traveling near East Apache Boulevard and South Dorsey Lane in Tempe. Witnesses reportedly saw Wallace and the victim involved in a verbal spat that escalated into a physical altercation, according to the police.

“A witness recounted hearing the victim verbally confront the suspect before the attack,” the affidavit notes. “During the struggle, witnesses saw the suspect retrieve a knife, described as a ‘steak knife,’ and repeatedly stab the victim at close range.”

Police say Wallace stabbed the woman several times in her left thigh, 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 her jaw. She was hospitalized with “life-threatening” injuries but survived.

“Several of the stabs were when the suspect was standing over the victim who was laying on her back in a defensive posture with the suspect using an overhead to downward stabbing motion,” the affidavit says.

Before the fight, surveillance video shows the victim pointing her finger at Wallace and “closing the distance” between them while Wallace was still seated. The victim can then be seen “getting up and walking towards the area” where Wallace is sitting “and standing over her,” according to the affidavit.

It’s unclear where the knife that Wallace allegedly used to attack the victim came from. Police say the victim can be seen pulling Wallace’s hair and fighting with her before the knife appears on video.

“[Wallace] picks up a knife with a red handle off of the car floor and begins to stab the victim,” the affidavit says. “[Wallace] proceeds to stab the victim at least 14 times. Midway during the stabbing, victim lets go of [Wallace’s] hair but [Wallace] continues to stab victim.”

After the fight and after fleeing, Wallace contacted a defense attorney and agreed to turn herself in with him, according to police.

“Her attorney … stated that his client Allante Wallace was at the light rail last night … and was attacked in which she defended herself then left the light rail in shock,” the affidavit says. “Wallace did not want to provide any further statements.”

Wallace appeared in court this week and her lawyer once again claimed that she committed the stabbing in self-defense, according to local NBC affiliate KPNX. The attorney said everyone on the light rail train with Wallace was “just watching” the fight and not stepping in, KPNX reports.

Wallace was ordered held on a $350,000 bond. Her next court date has not been listed online yet as of Thursday.