What is the test for showing that "ordinary investigative procedures, employed in good faith" would likely be ineffective in a wiretap application?

showing that "ordinary investigative procedures, employed in good faith, would likely be ineffective in the particular case." United States v. McGuire, 307 F.3d 1192, 1196 (9th Cir. 2002). The affiant in this case did not rely upon conclusory statements and provided specific probative facts. There is no requirement that the investigative procedures have been completely unsuccessful prior to an application for a wiretap. See United States v. Sandoval, 550 F.3d 427 (9th Cir. 1976).