C. on 09/30/2008
Tenants in upstairs apt had bedbugs in summer 2007. They thought they came from landlord who lived in basement and often brought home used furniture, landlord thought they brought them into the building with them.
No sign of bugs in main floor unit.
Landlord had company come in and assess whole house, then came back and sprayed upper apt as well as main floor unit and basement.
No bugs since.