Agent Ortiz is now in custody in the Webb County Sheriff's Office jail and stands charged with four counts of murder and a single count of aggravated kidnapping, Sheriff Cuellar stated.
The bodies of two women were found earlier in the week, and another two were found early Saturday morning.
Ortiz's arrest came on the heels of a case in April in which authorities in Laredo arrested Ronald Anthony Burgos Aviles, also a supervisor for the Border Patrol, and charged him with killing a woman with whom he was romantically involved and her 1-year-old son.
Juan David Ortiz, an intel supervisor for the Border Patrol, was arrested Saturday morning after he was found hiding in a hotel parking lot in Laredo.
"Our community is safe from this killer", Webb County Sheriff Martin Cuellar said in a statement.
Alaniz said that after the suspect picked up the fifth woman she quickly realised that she was in danger. Police say all his female victims were prostitutes. Cuellar said investigators believe heacted alone.
The investigation was started earlier this month after the body of Melissa Rameriz was found.
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"We feel that our efforts have gathered strong evidence against this killer". Alaniz says authorities consider Ortiz a serial killer. The body of a 29-year-old mother-of-two was found on 4 September, the Laredo Times said. The other victims' identities have not yet been released.
Mr Alaniz said the cause of death was similar in each case.
A U.S. Customs and Border Protection spokesperson confirmed Ortiz is a supervisory Border Patrol agent. "While it is CBP policy to not comment on the details of an ongoing investigation, criminal action by our employees is not, and will not be tolerated".
Ortiz was approached by police at approximately 2 a.m. Saturday and initially fled troopers.
"The arrest of the border patrol agent who has allegedly committed multiple murders could not have happened without the hard work and expertise of the Texas Rangers, the Webb County Sheriff's Office, the Webb County District Attorney's Office, and Laredo Police Department".
"Our sincerest condolences go out to the victims" family and friends.