Over much of the past year, the U.S. Drug Enforcement Agency and local law enforcement agencies have been carrying out the largest offensive against pill mills Texas has ever seen. There's no indication that the Texas Medical Board has been involved in any of these raids; their investigators merely check up on doctors associated with the clinics after the fact to determine whether there is grounds for disciplinary action. But at least some TMB investigators feel their jobs are putting them in harm's way. The TMB has a proposal to put their minds at ease. The board is considering a measure that would allow its investigators to carry concealed weapons as they go about their day-to-day business.