An Arizona sheriff says U.S. Border Patrol officials have repeatedly told him they have been ordered to reduce — at times even stop — arrests of illegal immigrants caught trying to cross the U.S. border.

Cochise County Sheriff Larry Dever told FoxNews.com that a supervisor with the U.S. Border Patrol told him as recently as this month that the federal agency’s office on Arizona’s southern border was under orders to keep apprehension numbers down during specific reporting time periods.

The senior supervisor agent is telling me about how their mission is now to scare people back,” Dever said in an interview with FoxNews.com. “He said, ‘I had to go back to my guys and tell them not to catch anybody, that their job is to chase people away. … They were not to catch anyone, arrest anyone. Their job was to set up posture, to intimidate people, to get them to go back.”

Dever said his recent conversation with the Border Patrol supervisor was the latest in a series of communications on the subject that he has had with various federal agents over the last two years. Dever said he plans to relay the substance of these conversations when he testifies under oath next month before the Senate Committee on Homeland Security and Governmental Affairs.

“I will raise my hand to tell the truth and swear to God, and nothing is more serious or important than that,” he said. “I’m going to tell them that, here’s what I hear and see every day: I had conversation with agent A, B, C, D and this is what they told me.”