Patel says shooting suspect worked with partner forces in Afghanistan | REUTERS

Key Concepts

• Federal Assault on a Federal Law Enforcement Officer
• Interagency Investigation
• Evidence Collection and Analysis
• Witness Interviews and Canvassing
• Search Warrants
• International Terrorism Investigation
• Afghanistan Connections

Investigation Overview

The FBI is leading a federal investigation into an incident described as an "ongoing investigation of terrorism." This multi-faceted federal assault on a federal law enforcement officer is being conducted on "many fronts."

Law Enforcement Response and Evidence Collection

Immediately following the incident, the FBI, in collaboration with law enforcement partners and the Metropolitan Police Department, secured the scene. The weapon involved was seized, and an evidence response team was deployed to collect evidence. The team initiated "block-by-block canvases" to identify and interview witnesses. The firearm and other collected materials were sent to the FBI's Quantico laboratory for immediate analysis, with this work currently ongoing.

Legal Actions and Geographic Scope

The investigation is proceeding in partnership with the DC United States Attorney's Office. Multiple search warrants have been executed across the country. Notably, a search warrant was executed on the subject's last known residence, located in the state of Washington, either last night or early this morning.

International Connections and Background Checks

There is confirmation that the subject had a relationship in Afghanistan with "partner forces." The investigation is actively exploring this aspect of the subject's background, including any known associates, whether they are located overseas or within the United States.

Nature of the Investigation

The described approach is characterized as what a "broad-based inter international terrorism investigation looks like."

Conclusion

The investigation is comprehensive, involving federal agencies, local law enforcement, extensive evidence collection and analysis, broad witness engagement, nationwide search warrants, and a deep dive into international connections, all indicative of a significant terrorism-related inquiry.