The informant said he'd known Brown for about 3 months, and had seen Les, a former mechanic, doing work on his brother David's truck
That was about as smmoth as Exlax! IMO of course!
Seriously, if I was in charge of things, whoever released this identity-revealing info would be doing some serious prison time, and would get hit with the cost of providing 24/7 security to the informant for the next 20 years or so.