An attorney representing a 15-year-old boy taken into custody by federal immigration officers says his firm is investigating the incident, while the government argues it acted appropriately in detaining the teen. According to the Department of Homeland Security, the 15-year-old was arrested on accusations of assault after he allegedly threw an egg at a Border Patrol agent following an incident on Chicago’s Southeast Side Tuesday afternoon. DHS Assistant Secretary Tricia McLaughlin said the teen allegedly admitted to the assault when arrested by federal agents. Another 19-year-old was also arrested for allegedly throwing chemical munitions back at agents in the Tuesday incident. The incident in question has sparked questions about tactics used by immigration enforcement agents, especially in light of a temporary restraining order that sought to limit the ability of agents to use chemical munitions and other tools. A federal court order issued last Thursday strictly prohibited federal officers from using tear gas and other riot control weapons against protesters, journalists or onlookers...except in "equivalent circumstances to those where the officer is authorized to use deadly force." Tempers were on edge on Tuesday afternoon when an Immigration and Customs Enforcement (ICE) vehicle chase terminated in a Chicago neighborhood. According to a DHS spokesperson, a Border Patrol vehicle was conducting an immigration enforcement operation in the East Side neighborhood when it was “rammed” by another vehicle, which then attempted to flee the scene. Local “Border Patrol pursued the vehicle and was eventually able to stop it utilizing an authorized precision immobilization technique (PIT) maneuver," the spokesperson said in a statement. NBC Chicago has not been able to independently confirm that series of events, but footage showed at least one vehicle, a white SUV, with front end damage at the scene. Security footage captured the collision between two vehicles at 105th Street and Avenue N. DHS officials say agents arrested two individuals in the vehicle, and alleged both were undocumented immigrants from Venezuela. An incident involving federal immigration agents ends with protests and tear gas being deployed. Christian Farr has the latest on how the incident unfolded. After the crash, a large crowd formed near the scene, with community members yelling at federal agents. Ultimately, Chicago police said several individuals threw items at agents, which prompted an agent to roll a tear gas cannister toward the crowd. It is alleged one of the items was an egg thrown by the 15-year-old, but his mother said the response by agents was an example of excessive force. “He was violated and slammed to the ground,” Juanita Garnica said. “I just want my baby back.” Attorney Antonio Romanucci of Romanucci and Blandin is representing the family, and said a civil investigation has been launched into the incident. He alleges agents held the teen for more than five hours without notifying family members. “Federal agents provided no information about his whereabouts, no phone call, no explanation for the arrest,” the firm said in a statement. “His mother’s terror was amplified by her son’s heart condition and the complete absence of any information from authorities.” Federal officials blasted the categorization of the arrest. “A U.S. teenager was arrested for assaulting law enforcement in Chicago. Any claims that CBP ‘kidnapped’ a U.S. citizen and held him in a warehouse are bizarre and categorically false,” Assistant DHS Secretary Tricia McLaughlin said in a statement. McLaughlin also blasted media for “falsely claiming” the teen was kidnapped, and criticized attorneys representing the teen’s family as working for “billboard law firms.” Community groups canvassed the east and southeast sides of Chicago to inform business owners and residents of their rights if they’re approached by federal agents. “ICE has continued to come to our community to terrorize, intimidate and create fear amongst our members,” Ana Guajardo of Centro de Trabajadores Unidos said.