Never heard of a cop shop testing for 'roids. I doubt they test for 'roids in the military yet, either. Didn't when I was in. Lots of .mil and LEO types roid up. Some, it gets in their head and they go off the deep end. I suspect they were already inclined to nuttery, though. Others, they just recover more quickly and carry more muscle mass.
Thing is, these days dealing in roids and HGH is a fool's game. You can go to an "anti-aging" doc and if you got the cash, you can be prescribed enough testosterone and HGH to float Sylvester Stallone's yacht.