I haven't posted in this thread yet despite having followed it closely for awhile now. I hope the coward is caught very soon.
On the topic of raspy voices - I often get a raspy voice / dry cough from talking constantly in my job and have to make sure I always have water nearby. So I definitely agree it could be someone who talks a lot. A teacher, a pastor, a dispatcher, anyone whose job/pastime requires pretty constant speaking.
Another possibility is that many medications cause dry mouth (some more than others) often causing cough/raspiness especially if taken short term or just begun a course of medication. Examples would be antidepressants/psych meds, and decongestants and antihistamines (especially the kinds with pseudoephedrine as that is very drying).
It is of course possible that it's also someone getting over a cold/flu/virus, a smoker or ex-smoker, or just one of those people with raspy voices for no real reason.
I can't help but think BG is likely a complete and utter loser like JP (Jayme Closs' abductor). A loser, a coward, and hopefully soon, a lifelong inmate.