The commission has been investigating the case since spring 2000.

The official said his office has investigated anywhere from 27 to 75 cases a year since 1988.

"The investigation has continued to be actively investigated since that time."

The center, a private group and the largest of its kind in the city, has been investigating discrimination complaints since 1964.

Federal prosecutors confirmed earlier this week that they have been investigating the central bank chief since June.

The prosecutors, it turned out, had been investigating the cartel since 1989.

Biological control of gorse has been investigated since the 1920s.

The government has been investigating this case since January.

This question is being investigated by a study of government in the United Kingdom since 1945.

They said they have been investigating us since last May.