A U.S. Border Patrol agent drives along the U.S.-Mexico border. In November, an agent died from injuries he received during an unknown event, which also injured another guard. File Photo by Earl S. Cryer/UPI | License Photo
Feb. 8 (UPI) -- The Federal Bureau of Investigation said it's found no evidence that two U.S. Border Patrol agents were assaulted in Texas last fall, in an event that left one dead.
Border agent Rogelio Martinez died in November while patrolling in the Big Bend Sector of the U.S.-Mexico border.
Martinez and his partner were conducting a routine check of culverts when they were hurt by an unknown event. Martinez's partner, Stephen Garland, suffered serious head trauma but survived. He's said he has no recollection of what happened.
In a press release from the office of El Paso Special Agent in Charge Emmerson Buie, the FBI said it hasn't been able to determine how Martinez and Garland ended up badly injured at the bottom of a culvert.
"To date none of the more than 650 interviews completed, locations searched, or evidence collected and analyzed have produced evidence that would support the existence of a scuffle, altercation, or attack," the FBI statement said.
Buie's office said Garland was "disoriented and unsure" of his location at the time, and thought both he and Martinez had run into the culvert.
The FBI had identified two persons of interests in the case. A forensic analysis, though, determined that neither had anything to do with the attack.
Monday, an autopsy report concluded that Martinez died from blunt-force trauma to the head.
The FBI is offering a $50,000 reward for information leading to the resolution of the case.