The main purpose of the Homeland Threat Response Act is to enhance the ability of U.S. Customs and Border Protection (CBP) to assist in investigations related to violent acts, shootings, and mass killings. This legislation aims to improve coordination and response efforts in addressing these serious incidents. Key provisions of the Act include authorizing CBP to be deployed in response to investigations of violent acts. This means that CBP will have a more active role in not only investigating these incidents but also in threat mitigation and resolution.