well, most likely they got a little overwhelmed and started to lose track of shipments and didn't catch when a shipment or two was late/delayed. (when customs snagged it and was testing it and setting up logistics of a controlled delivery, ect... if your regular shipping time is 12 days, and one of your packs is taking 16 days or more, something's up)
and if they're too well-known on 'the street' (people around town) as suppliers, and people know where they're located and where they live, ect.. that's just bad news.
a customer of theirs could be driving home from the bar/club and get pulled over for DUI, cop's search the car and find a gram of coke or a couple x pills all of a sudden this straight-laced investment banker who makes 100K/year is facing some charges that will change his life... he's gonna tell on whoever he can to make them go away.. and if he knows where a nice little steroid producer is located, you bet your ass he'll tell everything he knows.... besides, how many cocaine producers will he know? probably zero.. all he knows is the guy who sells him a gram at a time or something... cops want to move UP the food chain, and a steroid producer/supplier is about as high as they can get (next to the RAW guy in china).
doing local biz is risky.. but it carries a heavy profit margin. online you're looking moving test and stuff at anywhere from 35-65 per bottle, but face to face local deals will put those prices at 50-100 per bottle.. and if you can actually MOVE that much product locally, you're making some decent money.
but when you deal locally, not only do you have to worry about the guy you sell to, you also have to worry about the guys that guy associates with.. because you have no idea what he's telling his friends, or who his friends are.