SINGER is correct!
Transcript of audio file:
Well, Dave's out. He put this sign here, he wouldn't lead me to it and put the spotlight on himself. Plus, no one's busier than that guy. No, my gaze is firmly placed on Don Edgren now. That guy never says no, maybe our mastermind came to him and presented him an offer he couldn't refuse. I mean, he built most of this place, he'd have the inside knowledge on how to get in and out without anyone knowing. Maybe he's the one leaving me these envelopes. Or maybe, he's the one making the plan? He's sharp as a needle, that one.

