He's referring to the practice of Florida law enforcement claiming that the basis for a warrant came from "a confidential source" (which, in the context of warrants, appears to mean "an actual person"), when in reality they were using information captured via IMSI capturers ("stingrays") -- devices which MITM cell phone connections to surveil users of the cell network.

In short, he was saying that we can reliably expect many warrants to have been obtained by law enforcement lying to judges. Based on the information (lies) presented to the judges, they're going to approve the warrant, because they operate on the premise that law enforcement wouldn't lie to them.