The agency is investigating to determine if the treatment was the cause of the death.
She said the agency was also investigating its legal options.
The agency has investigated a number of prominent officials in the state.
The agency does not investigate car theft within a state.
The bureau is one of several agencies investigating the fire.
The department is one of the agencies investigating the killing.
"The agency is investigating the issue and considers it very serious," he said.
The agency is already investigating the firm regarding other tax shelters.
The agency is also investigating how the photo slipped through its editing process.
The agency also closed all operations at the mine and will investigate the accident.
