What would you think is the glitch? That portion of the Canyon is pretty open - there should not be a big problem is spotting wreckage.
Glitch? Well, without a good location from a 406 MHz ELT, or DFing on 121.5, you are only guessing as to the search area, based on the radar track, which is huge at best. Finding a crashed airplane from the air isn't the easiest when you know where to look. And, that's not exactly easy terrain to search.