Findings have been presented to the Department of Justice, two officials said.
The U.S. Border Patrol agents at the center of a controversy stemming from their use of horses to block Haitian migrants from entering the U.S. have not yet been questioned more than a month after the incident took place, according to a law enforcement official.
Images of mounted patrol agents using their horses to push back migrants, mostly Haitian, stirred national controversy as an unprecedented number attempted to cross the Rio Grande into the small border town of Del Rio, Texas, in September. The Department of Homeland Security launched an internal investigation into the matter shortly after the images came out.
Homeland Security Secretary Alejandro Mayorkas promised a swift investigation into the horse patrol over a month ago, assuring lawmakers it would yield findings days later. As of publication, and despite multiple requests for comment from ABC News, the administration has not publicly announced any findings.MORE: Border Patrol suspends using agents on horseback amid outrage
Preliminary findings from Customs and Border Protection's Office of Professional Responsibility have been handed over to the Justice Department to determine if criminal charges are warranted, according to two officials who were not authorized to speak publicly.
One law enforcement official said the internal investigation could not proceed, and the agents directly involved could not be interviewed, until the U.S. attorney makes a determination.