That same day, Pardo dropped her son off at school in a camouflage jacket, mask and tactical pants, but he left campus soon after

A Texas mother is facing a terrorism charge after she allegedly purchased ammunition and tactical gear for her son.

Ashley Pardo, 33, allegedly made these purchases while knowing her son had been planning a "mass targeted violence" attack at Rhodes Middle School in Texas.

On May 12, Pardo's son arrived at school wearing a camouflage jacket, mask and tactical pants, according to an affidavit obtained by PEOPLE, but he left campus a short time later.

Prior to that, Pardo "expressed to the school her support of [her son's] violent expressions and drawings" and said that she "does not feel concerned for his behavior," according to the affidavit.

Just a few hours after her son arrived at school in tactical gear on May 12, officers with the San Antonio Police Department arrested Pardo on a charge of aiding in commission of terrorism.

It was the grandmother of the boy who contacted law enforcement to express her concerns after she allegedly discovered her grandson hammering a bullet that morning.

When she inquired as to how he got the bullet, her grandson allegedly said that his mom had provided him with the live ammunition and had also taken him to a surplus store to buy tactical gear in exchange for babysitting his younger siblings, according to the affidavit.

She told law enforcement her grandson said he was "going to famous" as Pardo arrived to drive him to school that day.

The grandmother then decided to search his room where she allegedly found magazines "loaded with live rifle ammunition," "pistol magazines ... loaded with live ammunition," an "improvised explosive device ...using a mortar style firework wrapped in duct tape" and a note the boy left on the kitchen table which had the names of "persons who have committed targeted mass violence shootings" and the "number of victims from each shooting."

The boy's concerning behavior had previously been flagged, according to the affidavit, which cites an incident in January when administrators discovered "drawings" he did of the school in which he identified a "suicide route."

In a meeting to discuss these drawings, the boy allegedly spoke about his "fascination with past mass shooters" and their "manifestos," per the affidavit.

The affidavit also alleges that just a few months later, in April, administrators made the decision to suspend the boy after it was discovered he had been using a "school-issued computer" to read about the 2019 mass shootings at two mosques in Christchurch. New Zealand.

That attack left 51 people dead and the shooter streamed the first of his two attacks on Facebook,

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Later that same day, the boy allegedly tried to take his own life with a straight razor which resulted in "significant injuries requiring over 100 stitches."

In the wake of the suspension and "attempted suicide," the boy was moved to a different school but returned to Rhodes Middle School on May 8, according to the affidavit.

The affidavit alleges that Pardo "has been aware of threats made by [her son]" but was "dismissive" in conversations with local law enforcement, Child Protective Services, and school officials.

Those same agencies had also communicated their "concerns of her child's expression and desire to commit acts of mass violence," the affidavit alleges.

It is not clear if the boy left school on his own accord or administrators had him removed, but the affidavit does state that prior to his return, the school "implemented a security plan and changed their security posture due to continuing concerns of mass targeted violence by [the boy]."

According to court records, Pardo posted her $75,000 shortly after her arrest, was fitted with a GPS device and placed on house arrest. She is due back in court on July 17.

Her son is also set to be charged, according to Rhodes Middle School Principal Felismina Martinez, who said in a letter to parents obtained by PEOPLE that he was "detained off-campus and is being charged with terrorism."

Martinez continued, "Please know we take all potential threats seriously and act immediately to protect everyone in our care, We will always remain vigilant to ensure our learning and working environment is safe and secure."