DALLAS (FlashPoint) — In a breakthrough case, five people pleaded guilty on Wednesday to terrorism-related charges after being implicated in a shooting incident that wounded a police officer outside a Texas immigration detention center.

The Justice Department's charges come in the wake of a designation by former President Donald Trump that labeled the group known as antifa as a domestic terrorist organization, attributing political violence to the decentralized movement.

FBI Director Kash Patel previously indicated that the Texas charges represent a landmark moment, as it's the inaugural instance where a material support to terrorism charge has been applied against antifa. The confrontational group is known for opposing neo-Nazi and white-supremacist demonstrations, although it lacks a centralized structure.

The guilty pleas were entered by Nathan Baumann, Joy Gibson, Seth Sikes, Lynette Sharp, and John Thomas in federal court at Fort Worth, where each now faces a potential 15-year sentence.

Details from court filings reveal that during the attack on July 4 outside the Prairieland Detention Center near Dallas, one member shouted directives to gather rifles before opening fire. This resulted in an officer from the Alvarado Police Department being shot in the neck and injured, though he managed to return fire.

Prosecutors alleged that even after the officer was hit, more gunfire was directed toward him and an unarmed correction officer. The incident catalyzed discussions regarding antifa's role in escalating political tensions as the Trump administration intensified deportation efforts. A brief time after this incident, a separate attack on U.S. Border Patrol agents in McAllen led to the death of the shooter.

Sharp’s attorney described the guilty plea as "step one in a long process" before sentencing, indicating ongoing legal complexities ahead. Other cases related to the shooting are still in progress, as those who supported the actions of the shooters continue to face legal scrutiny.