Webb County District Attorney Isidro Alaniz told reporters at a press conference following the arrest that Ortiz qualifies as a serial murder. Ortiz was captured in the parking lot of a Laredo, Texas, hotel after fleeing from state troopers.
A fifth person, a female who was the victim in the alleged kidnapping, was able to escape and contacted authorities, providing a description of the suspect - including a vehicle, a white Dodge truck, authorities said.
Alaniz said investigators were still trying to determine a motive for the killings, and all the women in the case are linked to the sex trade. Alaniz said two of them were U.S. citizens but the nationalities of the other two were not yet known.
His statement added: "Our sincerest condolences go out to the victims' family and friends". According to local media reports in Laredo, 150 miles (240 km) southwest of San Antonio, they had been working as prostitutes.
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But Maria Kazimi, a student in Moscow, rejected the idea the pair were either a gay couple or spies on a killing mission. Russia Today attempted to make inferences about their sexuality, asking: "All the footage features you two together".
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Long said FEMA is used to the blame game because disasters are frustrating and FEMA is always the end of the line. Other Trump Administration officials have been investigated for ethics issues related to travel.
While it was not agency policy to comment on the details of an ongoing investigation, Meehan said, criminal conduct by CBP employees is not and will not be tolerated.
Cueller did say that authorities have "very strong evidence" to link Ortiz to the crimes, and called him a "serial killer".
Ortiz, Cuellar said, spent 10 years as an agent with the US Border Patrol. "We value the release of timely information and we are making this notice public in order to remove any unnecessary fear in the community", the statement said.
Having just spoken with Webb County Sheriff Martin Cuellar, there is no doubt in my mind that the heroic efforts of these four agencies have saved lives; they are to be commended.