Federal investigators are trying to determine what went wrong when friendly fire resulted in the fatal shooting of the U.S. Border Patrol Agent Nicholas Ivie, the USA Today reports.
A preliminary investigation suggests agents became disoriented while responding to a ground sensor near the U.S.-Mexico border, according to the USA Today.
“There are strong preliminary indications that the death of Ivie and the injury to a second agent was the result of an accidental shooting incident involving only the agents,” the FBI said in a statement.
Officials originally believed other suspects were involved and fled to Mexico, a scenario that authorities say looks unlikely.