Good question. I don't know anything about wire taps. Perhaps it was done this way to show that things don't get wrapped up neatly in one hour like on TV (LOL). Perhaps they just weren't that tech-savvy. Possibly, it was to show that all these FBI guys with their smug attitude, fancy equipment and procedures, bumbling around for 45 minutes, STILL won't be able to do what the little guy in the raincoat, who has to go to the bathroom, does.