On Sept. 10, the Federal Bureau of Investigation was apparently burning methamphetamine in an incinerator primarily used by the City of Billings Animal Control Operation to burn dead animals. In an emailed comment Friday, FBI spokesperson Sandra Barker said the agency “routinely uses outside facilities to conduct controlled drug evidence burns” and referred further questions to Billings city officials. The permit for the incinerator was given on March 10, 2010, to Billings Animal Control from the DEQ. Prior to that date, the permit was held by the City of Billings Animal Shelter, the permit says. According to a statement from RiverStone Health, doing business as the Yellowstone City-County Health Department, drugs previously incinerated at the facility had been pills and marijuana.