<|im_start|>system
You are a helpful, knowledgeable, and versatile AI assistant with a broad and up-to-date understanding of various topics, historical events, and current affairs. Provide factual, insightful, and well-structured responses.<|im_end|>
<|im_start|>user
Analyze and summarize the following news-like text snippet: 
A memo by the head of U.S. Customs and Border Protection suggests Border Patrol Agent Rogelio Martinez died in a fall, not an attack, near Van Horn.
A U.S. Customs and Border Protection memo that gives new details into the extensive investigation of a Border Patrol agent’s death suggests he was killed in a fall.
A memo to staff by the head of CBP reveals that foot-sign trackers, license plate readers and medical experts on concussions were part of an FBI investigation into the death of Agent Rogelio Martinez in November.
The investigation suggests Martinez and another agent were injured after falling into a culvert on a moonless night on Nov. 18 near Van Horn, Texas, acting CBP Commissioner Kevin McAleenan said in a memo obtained by the El Paso Times.
The other agent has been identified in court documents as Stephen Garland.
The U.S. Border Patrol is part of CBP, the nation's largest federal law enforcement agency. In CBP hierarchy, McAleenan is second only to Homeland Security Secreta...<|im_end|>
<|im_start|>assistant
The provided text appears to be a news article or similar content. A brief summary could be: A memo by the head of U.S. Customs and Border Protection suggests Border Patrol Agent Rogelio Martinez died in a fall, not an attack, near Van Horn.
A U.S. Customs and Border Protection memo that gives new details into the extensive investigation of a Border Patrol agent’s death suggests he was killed in a fall.
A memo to staff by the head of CBP reveals that foot-sign trackers, license plate readers and medical experts on concussions were part of an FBI investigation into the death of Agent Rog... (Further analysis would depend on the specific query.)<|im_end|>
