The trial for a U.S. Border Patrol agent accused of murdering four women in Texas has been postponed until October.

Thirty-five-year-old Juan David Ortiz was set to appear before a judge in the 406th District Court on Aug. 5, but the date has been moved, the court announced Friday, Aug. 2.

Ortiz pleaded not guilty to the capital murder of four female sex workers and the kidnapping of a fifth in a string of crimes that occurred over 11 days in September 2018.

Ortiz allegedly picked up the four women—Melissa Ramirez, 29; Claudine Ann Luera, 42; Griselda Alicia Hernandez, 35; and Nikki Enriquez, 28—from Sept. 3 to 14, drove them to remote locations around Webb County, shot them each in the head and left  them in the road to die, authorities said.

All four victims were sex workers who congregated around a street in Laredo known for the sex and drug trade. At least two of them were American citizens.

Ortiz was arrested hiding in the parking lot of a Laredo hotel on Sept.15, 2018.

He is being held on a $2.56 million bond and considered the first serial killer in Laredo, Texas, where the murders occurred.

Ortiz was a former intelligence supervisor for the Border Patrol and worked as a federal agent for 10 years.