I think in general, you were super close, personality-wise.
I can’t even find mine, but I remember writing about OCD (I don’t know if he has it), being on the high end of intellect (don’t know and not sure), being not very social (still think), hating mostly himself but taking it on women (almost positive he has it).
About a profession, I remember writing, what if he works for a cellular company, selling phones or installing lines? I mentioned an Australian serial killer who worked in some telecom-like company. I also felt that another work of BG could be some IT where he’d have access to people’s addresses.
In this, I believe, I was not far off, because his job is a service, but of a type where you pay more attention to the end product than to the person (think delivery man where you sign and get your package). With pharmacy tech, too, you pay more attention to the brown bag than to the person providing it. Also, he does have access to a database of addresses.
I think you were super close to his personal traits, much more than I. To myself, I think that professionally, I was constantly looking for someone being around but not seen, even thought about people renovating bridges, you know? So in this area, to myself, I think I was close.
Where I was mistaken: I thought he’d have the guts to kill himself. No such luck, but I hope he is watched, day and night. He is a pharmacist; he might think of something unusual. Meds given to him need to be checked, not even floss in his cell.