Law Enforcement agencies appear to have an uphill battle in finding the persons responsible for murdering Border Agent Nicholas Ivy.
Things are expected to be difficult for the FBI, Border Patrol, and Cochise County Sheriff's Department because they have no known suspects and no guns recovered.
Border Patrol Commander Jeffrey Self says their resolve to catch these killers is strong knowing Ivie can never return home to his wife and daughters.
The FBI, who's leading the investigation, is keeping tight lipped about the probe.
It will only say it'll take days to process the crime scene.